This came out of a conversation at work.
"She's a girl"
"Why can't you respect that she identifies as a boy?"
"Because she's not a boy, she doesn't have a penis"
"you're talking about sex not gender"
"So what is gender? Why use the same words as sex?"
It's the heart of the problem. We're using words in such a way that allows nonsense to appear meaningful.
The guardian recently had an article about dick pics. A woman started researching and received lots more diverse images "women with penises". That phrase only works if you use "women" to mean gender identity whilst referring to the actual sex parts of a man.