TBH it doesn’t even need to go as far as sexual assault in order to be a serious issue. Even if 100% of trans women are completely harmless and respectful, there’s still an issue of privacy, dignity and consent. I’m not a sex offender, I don’t present any threat to women as such but that doesn’t give me the right to override their consent when it comes to nudity, regardless of how I ‘self identify’.
It works both ways too. Egg mentioned how young boys would feel seeing a bloke in a dress getting changed; for me that’s not an issue. Far more of a problem would be if I was a teenage boy and a naked girl was stood next to me ‘self identifying’ as a man. All joking aside, how would you feel standing around naked with all the boys you knew at school, each with a stonking great horn. It’d be highly damaging to a young man’s psyche.