@ErrolTheDragon My initial explanation 'it means that some of the women will announce themselves as she/her , while the men ignore it' wasn't sufficient enlightenment
My experience (in a university) is more mixed. Yes, some women do seem keen to she/her themselves. These are mostly younger, not parents, and very right-on with respect to “progressive” issues. (Not consistently what I would call progressive mind you).
But, many older male colleagues do this too. When I see senior men putting HE/HIM at the bottom of every email they send, it doesn’t half reinforce the patriarchy. “I am your boss and I AM A MAN AND DON’T YOU FORGET IT”