If you can accept that there are people who are bi-sexual and on a spectrum of sexual preference, it is equally possible that there are people who experience the same with respect to gender.\
Your last post is most revealing. You think that gender is literally only about chromosomes.
I don't know why. You haven't provided any sound scientific basis for X and Y to solely define gender expression.
Somehow, too many people believe that gender and therefore gender expression is solely a matter of primary sexual organs and are determined to force fit everyone's behaviour into that model.
A few weeks ago I read some comment in X or something, from someone pretending to be very undisputably clever and downto the matter by stating that, when a trans person's bones would be found in a few centuries, the pelvic angle would provide an evident proof of the gender of that person, which is like saying that the bones of any black person anywhere in the world would make obvious their African nationality while alive.
Gender is like nationality, it is what you are, not what fleshes you out materially (funny that people who always rejected "communist materialism" as an abomination, would otherwise resort to the coarse materiality of biology to declare what the psyche and "spiritual" essence of a person is actually like), and the best proof of it is that there are centuries of role playing and cosmetic gender differentiation through hairdos and clothingand what not, that have made of gender more of a social construct than a biological reality and "essence", and it's rich that people who have been forced to abandon (to a certain degree), that pants do not define men and long hair does not define women, now must resort to a positivist construct to pretend they are being "scientifically truthful" in their political pretense.
Well, this is one of the problem with the word 'gender'. It is very ambiguous and people use it to mean all sorts of different things. This makes it very difficult to have a conversation about the trans topic as this word is the common word people throw around, and people mean different things by it. I will give you 4 common definitions of it:
1. First, gender was historically used as a synonym for 'biological sex' (i.e. if you are male/female/intersex). People preferred the word 'gender' as sex has a negative connotation (as sex also means 'having sex') so people used the word 'gender' as a euphemism. Even now, when people ask you for your gender in passport, national ID, birth certificate, forms etc, all they are asking is your biological sex. So this is probably the most common definition, that it's an euphemism for biological sex.
2. Second, gender is defined as gender expression, especially understood as the cultural stereotypes surrounding femininity and masculinity. This includes things like dressing style, hairstyle, toys people play with, preference for colors etc. This is mostly socially/culturally constructed and can differ from culture to culture, plus there can be various differences in the individual level as well. There is a better word for it: personality. People can have any shades of personality from 'very feminine' on one end to 'very masculine' on the other end.
3. Third, there is gender roles that society expects of each sex. Some of it is biology-based (like roles related to reproduction), some of it could be culturally determined as well.
4. Finally there is this concept of 'gender identity', that trans activists and others use the most. They will say there is an internal state of being male or female (or man or woman), or both or neither. That this can clash with their anatomical sex, leading to gender dysphoria.
When I say, "people can't change sex as that's scientifically impossible", trans activists often reply "people are just identifying as or transitioning to the opposite gender, not opposite sex". To that, I always ask, what they mean by gender, and I usually get no specific answer. That's why I gave the 4 definitions above, as people use the word gender to mean different things, but they usually fall into one of the 4 definitions.
If they mean definition #2 (cultural stereotypes associated with femininity and masculinity, like how you dress and present yourself to the word, or how feminine or masculine people are in their personality), then people should be able to dress and present themselves any way they like. Society should be accepting of people dressing and living their life like they want. Don't see the need to undergo medical transitioning if it's definition #2 they are talking about.
If they mean definition #4, then there are a number of problems with that. First, we do not know what causes people to say they have an inner gender identity that is at odds with their biological sex. Could it be neurological? Environmental influence later in life? If undergoing medical transitioning helps people overcome this gender dysphoria, they can go for it if they are adults. However, gender identity is an internal state of mind. Unless they have fully transitioned, one should not be using facilities meant for the opposite sex (i.e. males should not be in female bathrooms or prisons, just because they proclaim to have a female gender identity in their mind). The modern trans activism is trying to push this "self ID" concept, which will allow a man to literally become a "woman" by merely proclaiming that he feels like a woman internally, and with just a document he can now access all these female-only spaces (like female bathrooms, prisons, dorms etc) by claiming himself to have the gender identity of a woman. This is why you have male rapists (who still have his penis intact) like Karen White put into female prisons, just because he claimed to have a female gender identity. So definition #4 (inner gender identity) cannot be used to allow people access to sex-based rights of the other sex. In fact, people who feel a man (adult human male) is literally becoming a woman (adult human female) by simply identifying as such are people who think a male can become a female, in which case they are talking about definition #1. Despite the fact that these trans activists claim to separate 'sex from gender', I often see them conflating sex with gender.
And beyond my comprehension when homosexuals take this stance.
One reason is, a lot of these 'trans' identified youths are closeted homosexuals, struggling with internalized homophobia, and they think transitioning is a path to salvation. There is a disproportionately large number of same-sex attracted trans youths, especially in teenage girls seeking medical transitioning.
Another reason is, our sexual orientation is biological sex-based, not gender identity-based. I am a gay man, which means I am attracted to other men. A transman (biological female who identifies or even went through the process of transitioning to make themselves look like man) will not be in my dating pool (even theoretically). Even if he is indistinguishable from other men, a trans-penis will not be attractive to me. Major gay org like stonewall has started to redefine sexual orientation in terms of gender identity rather than actual physical sex of the person, which I find problematic.
I don't know if you know this, but lesbian dating sites are now full of straight men identifying as women, then identifying as lesbians (as they attracted to women). Many of these men haven't even gone through a formal process of transitioning, but are just putting in lipstick and keeping long hair to say they identify as women, and are attracted to women, so that makes them lesbians (transbians, a term they coined). My lesbian friend complained to the mods of the dating apps that men are in there trying to date lesbians, to which the mods replied that we have to respect people's gender identity, so now if these males say they are woman, they are woman, and if they say they are lesbians, then they are lesbians (in reality, they are straight men as most of them haven't even transitioned). she eventually gave up on the dating app due to the influx of 'transbians'.
I think biological sex should take precedence over people's perceived gender identity or gender expression.