Transgender people have. They are the ones who want to use a certain restroom based on gender.
So a transgender woman shouldn’t be forced to use a restroom full of men now, but it’s okay if she is forced to do so because there’s no women’s-only room for her to choose.
Okay, so here’s the deal.
Trans people, at least those who others know (or even suspect - cisgender people have already been targeted just for looking like they might be transgender) may face just as much, or even MORE, threat by using the bathroom of their gender rather than their sex these days. The rightwing fanatics are after them now. So if it’s about protecting them, that solution isn’t necessarily going to work either. And if protecting them is the highest priority, how could you possibly oppose, say, the suggestion that we offer special restrooms just for them?
I’m not talking about soon. It won’t happen overnight. But my point is that it won’t even matter. If you can’t know what gender or sex other people in the restroom are - because they are either transgender, or they simply look like the opposite gender from their sex but don’t identify with it - then what’s the point? Why even have gendered restrooms, or sexed restrooms, or whatever? That process could happen rather quickly now that transgender people have opened the door to it. And that’s a GOOD thing.