I'm a little unclear on how what you or BBN have said and what Gentleheart has said are supposed to be in opposition, honestly.
The pointing out of all of these camps and stripes and mixtures of bisexuality is really an issue of bisexual identity.  From the point of view of someone who is not bisexual and may be thinking about the possibility of a relationship with a bisexual person, what Gentleheart said remains even more valid the more camps we can point out in the bisexual tent.  I wouldn't want to waste time investing anything emotionally in someone who bonds more closely with women emotionally... or bonds more closely with women sexually... or can't bond intimately with men but loves sex with them.. you get the idea.  I'm unsure if a bisexual person could offer me what I would want in a relationship (an equal partnership/investment in all dimensions and flowing both ways equally) unless they were in the category of bonding more with men sexually and emotionally.... and likely for all intents and purposes a "gay guy" in most discernible respects of romance.
		
		
	 
My observations about sexuality, not bisexuality.
Bi men are often assumed to be only interested in one gender for sex and the other for romance, or that they only want one gender for romance and sex.
The easiest way to deal with that in my view is to say, yeah, so what?  It is true of some bi men, but it is certainly true of some straight men and some gay men too: they only want sex. It was actually a gay man, not a bi man, lecturing me the first time I heard the argument that there's a difference between love and sex.  All he was looking for was sex with a man and love with no one.
I see the same distinction but I have never wanted only one of those things, and I would only begin from love.  Sex is a great addition to love, but I want that deeper connection before I spend time with anyone, in bed or otherwise.
My own life story shows me I need both. I could fall in love with a woman but I definitely did not want to sleep with a woman when that was the next step in our journey.   At least not with that woman.  And I had a few shots at sexual experiences with guys before I met my guy, but I called them off either before they got anywhere or even part way through because I didn't want to go through it in a situation with no love and no relationship.
I would never have met my guy through a casual thing like BBN.  But one way or another, he, like I seems to get that both sides of a relationship physical and emotional can exist, even if it was a surprise to him.  I don't doubt for a second we're both able to appreciate those things and have those things in our lives.  Other people though just want a romp in the hay, or they find some people right for romping and others for building a life together.  I don't get why having a penis or a vagina makes a difference here.  If a bi guy wants to just fuck men and love women, he will. If he wants to fuck women and love men, he will. If he wants to fuck them and love them, he will. And, my point: if he just wants to fuck either of them and love nobody, he will - and that's noooo different from a gay guy who just wants to fuck guys with no strings.
I mean I'm with a guy, I will only be with my guy, and I'm definitely distracted by other hot guys.  How is that different if a bi guy is with a guy, will only be with his guy, and gets distracted by a hot pair of lady tits one day?