“You stated that a man’s internal feeling that he is a woman has no basis in material reality. A lot of people would find that offensive and exclusionary.”
How far are we willing to roll back women's rights so not to offend transpeople?
I find this whole thing terrifying.
Until 1990 - 3 years before the end of apartheid in South Africa - there were parts of Europe where women were still denied the right to vote in local elections. Switzerland didn't allow women to vote in federal elections till 1971. Nobody cared if they felt female.
Countries that force women to cover their heads in public don't make exceptions for women who claim to be 'deminonbinary'.
Women aren't less likely to become pregnant through unprotected heterosexual sex if they don't identify as female.
Women are denied the ability to participate equally in society because of our biological sex, not our identity. We cannot protect rights without the ability to name the people who need protection.
It's the same for any other protected characteristic. They are required because the characteristic intrinsically limits the practical ability to access human rights (e.g. elderly people may not have the ability to work therefore need pensions, a disability may reduce access to transport therefore buses must make special provisions); and because people suffer discrimination as a result of possessing that characteristic, regardless of their identity.
Bhutan has laws against sexual acts, not people with blue hair who go on Pride marches.
If it were possible to identify out of having a protected characteristic they wouldn't be necessary.