Some people believe that trans rights mean that suddenly everyone will try to claim they're "actually" men or women without any real skin in the game. I find this line of reasoning, no matter what your opinions about biological vs. other types of gender or about pronouns are (personally, I find pronouns besides he, she or they to be slightly ridiculous), to be akin to "gay rights mean people are going to stop having children" types of arguments. It's just not such a big deal that it's worth starting a culture war over IMHO.