As I understand it, "people with <x> genitalia" is a trans-accepting way of discussing medical issues without rejecting anyone's gender identification. Having a vagina is no longer considered necessary or sufficient to be called a "woman".
- There’s a greater argument to be made for binary biological sex, and you can attach obvious descriptions to it to make the two categories distinct. - Gender on the other hand is more fluid (both historically in its expression, and in between cultures). - Biological based terminology can be used historically (e.g. Women’s History)
But this is all off topic, so I’ll stop here.