That's not the majority view, though. For most of us it goes like this:
- Most physical violence is committed by males
- Males are on average stronger than females so the damage a male can do to a female is considerably worse than the other way around
- Males commit almost all sexual crime
Therefore:
It's important for women and girls to be able to get away from males to do things that make them vulnerable, e.g. getting changed, going to the loo, having a smear test.
It's important for women and girls to have female-only spaces to recover after domestic or sexual violence, and so that women from some strict religious communities have places they're allowed to go to.
It's not all about violence. There's also privacy, respect and equality of opportunity to consider.
It's important for women and girls to have separate sporting competitions and records so they have a realistic chance of winning against people of comparable anatomy. In the case of contact sports it's essential for the safety of participants that they're segregated by sex as well as by age and in some cases weight.
It's important for women and girls to have some separate scholarships, selection panels and so forth so that there is a mechanism to increase representation of women and girls in male-dominated areas like the House of Commons and STEM courses and jobs.
It's important for women and girls who are same-sex attracted, i.e. lesbians, to have support and social groups which are female-only.
It's important for women and girls to have issues that only or disproportionately affect females openly discussed and to have research done into medical problems, laws and policies made to combat discrimination, improve health outcomes etc etc, and not to be shouted down as exclusionary for wanting these things to be addressed.
Transwomen are males. Nobody thinks that transwomen as a class are more dangerous than other males, but there's no evidence that identifying as trans changes male pattern behaviour. If all males are justifiably excluded from something, that should include transwomen
Also, if self ID is acceptable, there's no obvious way to tell who's a genuine transwoman and who's a non-transwoman chancing his arm.
The confused 12yo male child who now identifies as a transgirl is probably no danger to anyone, but I'm afraid there are 12yo boys who commit sexual crimes, e.g. voyeurism, inappropriate touching. Sexual violence is on the increase in our schools and is not being taken seriously enough.
If we exclude all the other 12yo boys from the girls' changing room we should be doing the same for the transgirl. The girls need privacy and safety just as much as the transgirl.
A third space is perhaps the way forward there, although my preferred option would be to work with the boys (and girls) on learning to accept gender nonconforming behaviour.