Kind of a tangent off your point but you’re referencing the "girls do not exist on the internet" phrase like it was used by people to say don’t bring your identity onto an anonymous forum.

Was that how it was used? Back in my forum and chan days when that phrase was common I only saw it used to explicitly try to force women off the internet. It was usually quickly followed up with “tits or gtfo” for instance and I never saw an equivalent push on anyone mentioning they were a man