There's this little logic hop that happens in genderist arguments. You define something one way, look at some data or make an argument, then change your definition and pretend the same conclusion applies.
Classical example is women (biological) need separate sports categories due to different physiology. Change definition of women to gender identity and descriptor of women to "afab". Conclusion no longer holds - it's now "afab" people who need separate sports categories in their terminology, but genderists conveniently don't notice that.
Use a wide definition of health conditions mainly diagnosed at puberty and casting no shadow of doubt on a person's sex, and declare 2% of the population "are intersex". Change definition and say intersex means babies for whom their sex is ambiguous at birth - boom, 2% of babies have an ambiguous sex at birth. Allsorts told my child that in a school assembly recently 
Refuse to record sex, record self-ID gender instead - no reason to segregate prisons by sex, look, sexual offences by women are on the rise.
You can't even tell if trans women are in your changing rooms, they pass so well. So you mustn't query any obviously male person as you can't know how they identify.
Changing rooms all have enclosed cubicles so you're being bigoted not to want penises in the communal women only showers.
Any more?