She does explain in the article. I think it breaks down as:-
- Men =
women Men
- Women = Women
- Men who are wearing dresses and asking to be called womens names = men
- Men who are the above but taking hormones = men
- Men who are the above but have had full reassignment surgery and obtained a GRC = women
So basically you have to be "all in" to earn the right to be called a woman. Just putting a dress on and calling yourself Shirley doesn't count. She doesn't countenance the belief system where if you think you are a woman, then you are a woman regardless of the fact that you have a fully male body with penis and testicles, and I think that is the sticking point for many people, especially where it seems to be being used to erase women's rights and equalities.