So every book should not have any relationships, right? If indoctrination is bad and wrong, it’s bad for everyone, right? No books should include heterosexual relationships, right? No books should discuss gender heteronormativity, right?
There’s nothing wrong with being gay, or being trans-gendered. There’s also nothing wrong with being straight or cis-gendered. There’s also nothing wrong with talking about these things or anyone seeing them. If there is something wrong with one, it’s wrong for the others too, unless one is somehow better than the others. If one is better than the others, please elaborate on your reasoning, and before you do understand many animals naturally are gay so an appeal to nature is not an acceptable argument.