I care because I can’t stand to see scientific reality be dismissed like this for the feelings of a minority. Sexism still exists, and to imply that women are only women because of their identification or “women’s brains” totally erases it. A woman can have any brain, any personality, but women are united by their female biology.
So far I have only discussed this with tolerant friends and on social media (not under my own name).
I have faced a lot of online abuse.