Thats because the only groups that effectively shut down speech is people on the left. and the left never attacks people's alternative sexuality. because he doesn't do anything that might piss off the leftists that usually destroys people's lives he continues to live on. even in the 1920s there were books with drawings like his shared amount groups, and outside of this one group of evil people in the 30s/40s most countries were fine with not prosecuting people that draw obscenity like he does. even the so called "transgressive" acts like GG Allin or more long lived people like John Waters never spent a day in prison despite how his works were pushing the limits of free speech and good taste. really this guy has never tested boundaries of free speech because outside of that group of evil people in the 30s/40s no one has effectively stopped this sort of shit or given enough of a fuck to try and form a boundary around this. people are going to bring up Larry Flint and his elk, but again long bogus legal battles that almost always resulted in his favor isn't the same as spending 1000 years in prison because someone hundreds of miles away died and we don't like your politics.
And mind you; Pornographers despite the shitload of mentally ill weirdos and trailer trash and failed entertainers are in the industry, none have anything beyond missionary-esque political opinions.* the closet i know of controversial political statements in porn in the last 20 years is in 2005 when a Trump's Chosen man and Trump's Chosen woman were making too many holocaust jokes and it pissed off the Trump's Chosen director. (and for even more proof there is no real sex related free speech boundary, how about the fact that we can't even say J.E.W. on this fucking forum without it being corrected into something else, yet every sex act imaginable can be shown/talked about here and not a single correction is ever made)
Honestly I'm more amazed he didn't/hasn't tried to capitalize on his fame. Like i could imagine him being head of his own animation studio and making animated tv shows for companies like Netflix. The fact that we don't have him being a guest star on Big Mouth or Rick and Morty says more about how humble he must be more than anything. I'm sure he could have been a lot bigger with his talent and notoriety.
*Mr.Masterson even said how none of the porn-related credit card processors even wanted his business because even to pornographers, the opinions of the people on New Project 2 are too risky to associate with their brands.