No I am not arguing that biological men can be biological women.
But I am saying that the lived experience of a biological male assigned medically as a female at birth, and raised as such, is one of the many instances where gender and biological sex may not line up.
Where biological sex distinctions need to be respected (i.e. sport categories), this gender difference should not override protection of biological women. But in day to day life I have nothing against a biological man who was raised as a girl, identifying as a woman in gender (i.e. there are many nuances to this discourse - and we can respect all while still protecting biological female's spaces).