For some reason, anti-trans people are fucking terrified of the government forcing them to use someone's preferred pronouns. This occupies a lot of their thinking, and they put a lot of effort into making sure -- at multiple levels -- that this could never happen. (And, if you ask them, most of them are convinced that there are many places in the world where it's already happening.)
I really don't get it. Even if it were somehow true, how bad is it, really, to have to use someone's preferred pronouns? Is that really such a big deal? Would it really hurt them so much to do that?