How do you feel about safeguarding women and girls OP? Why do you think sex segregated spaces exist?
Self-ID will give any man access to any sex segregated space on his say so. If he says he’s a woman, he will be and no one will be able to challenge this. Do you really think this won’t be taken advantage of? It already is. In prisons, sports, refuges, awards, pretty much everything you can think of.
There is an argument that if people offend they should be dealt with under the law but it shouldn’t get that far, women and children shouldn’t have to be sexually assaulted or worse first - that’s why safeguarding exists.
I’m sure most trans people aren’t an issue but it’s impossible to tell who is genuine and who isn’t. If you open that door there is no closing it, at least not before some serious harm has been done.
And that’s just one reason before you even get into the silencing of women’s concerns, the reinforcement of gender stereotypes and the erasure of women as a sex class.
We are not being mean, there are consequences to this. Just because you don’t mind seeing a penis, there are plenty of women who for various reasons absolutely do not want this.
And in matters of consent, no always trumps yes.