Apart from what other people have said about men not respecting women's boundaries are already, and immediately, displaying a red flag, I wouldn't want to share my space with men who are genuinely safe anyway. Even if they didn't realise they were upsetting women.
I don't want to share my changing room because of privacy. I don't want to share with my brother, or my son's friends, or my late father in law. All delightful and wouldn't hurt a fly.
Although there is the obvious problem of predation, it doesn't start and end with that. There is dignity and privacy as well.
it's very galling that suddenly we have to justify why we want to get changed in private!!