You're right my comment does technically, but in my defence it wasn't responding to a good faith discussion about free speech, it was responding to a bad faith transphobic talking point. But yeah I could've made that point more politely.
This accusation gets thrown around far too easily these days; it's really losing its power. A few years ago, if someone was accused of saying something transphobic, I'd think, wow they really must have said something horrible like a slur or an abusive remark.
Nowadays, I just assume that they mentioned a previously uncontroversial fact relating to biological sex.