"Up until about 150 years ago all toilets were gender neutral. I don't know why that changed."
That has to be one of the most ignorant comments I've come across on this forum.
Humans were doing a lot of things 150 years ago that we no longer do today, many of them quite uncivilised.
What if my mother, wife or daughters feel uncomfortable finding themselves alone in a personal area like a public bathroom with a strange man? Or is it a case of their opinions are to be excluded in the interests of ...er ...inclusiveness?