Have you actually been to a drag queen story hour? There's nothing shocking about it.
No, I have seen them in full via videos. That the group is there as a poltical support statement is obvious.
The majority of the straight population views drag as deviance when outside night club entertainment. They also have become hypersensitive to all aspects of adults approaching their children, thanks to the internet and the propensity of news media to hype and scare to get viewers. Everyone is a serial killer, etc.
The whole schtick of drag is a burlesque act, correctly associated with vulgarity, obscenity, double entendres and coarse content. Schools and institutions that have children under care are hyper careful about exposing children to objectionable sexual content, right down to enforcing dress codes to remove sexualization of appearance.
Taking a burlesque act and temporarily removing the character's whore persona and pretending the man is suddenly not a sexualized representation is intentionally disingenuous, playing a game of blink with the public. Parents choose when to introduce sexual matter to their children, and pretending crossdressing or burlesque is a less controversial aspect of sex than the birds and the bees is intentionally shocking.
There is a segement of the population that advocates against amost all sexual mores and works to poke them in the eye as a social statement against the imposition of social standards they find chafing and prudish. It is clearly a counterattack.
Further, the association of drag queens witth gays is a trope that is outdated and against equality. The whole point of drag is to tittilate and shock and by that extreme entertain with humor. The act furthers the assumption that there is some raging queen inside gays, wanting to be not just a woman, but a diva. The whole schtick of being an out and proud whore in the act is then conflated in the public mind with transexuals and gays.
The trans people I have met are not out to turn the world on its ear. They are simply trying to survive and fit in as who they feel they are inside, and it's not Mae West.
And gays I have known are largely not wanna be femme fatales. They are men who like sex with other men, masculine or feminine or whatever.
There is an unspoken code in LGBTQ politics that all aberrations from straight are equal. That's not true, and it never has been. There is also some mantra that drag is part of our political coalition for civil rights. To the degree that private clubs have the right to have raunch comedy acts, that is true, but drag is not a sexual orientation, nor an identity. It's an act, even in gay clubs. It can be by a gay man, or not.
We need to stop confusing the whole subject by pretending drag is some sexual preference or lifestyle. When I go to the Shop Rite, I never see a man in drag buying corn flakes. I have seen men in drag in places to be seen, like a mall in Dallas or Atlanta, but they were clearly there to be seen, not going about daily life in drag.
Being nice to kids in a reading time and at the same time pushing a statement about sexuality in a larger conflict with straight America is not a valid or wise strategy for taking a seat at the public table for equality. It is an errant shock tactic that is geared to evoke reactionary response and then cast aspersions for the prudishness. It does and will create a rise in conservatism at the very time that gay acceptance was increasing steadiliy.