Artists are still needed to make input for AI, they aren't completely replaced by a machine.
Spotify eventually popped up, and "solved" a big problem in music streaming. But at a cost - the record labels have them by their balls.
You don't see any leading "pirate" Spotify clone dominating the market. Closest thing is YouTube, but monetization goes to the content owners.
So here's what you do, if you're a bunch of creative artists / content owners / etc.:
You find one company that's commercializing the tech, and sue them into oblivion. Force them into signing a deal that ensures they'll never be profitable.
Others will follow.
But, yes, obviously the models are out there. In the same way that people are pirating stuff like they've always done. You can't do much about individuals running models on their own rigs - but that's not the point.
The point is to make it as painful as possible for people that feel the urge to commercialize something at scale. The goal is "Fuck you, pay me" or get dragged through the courts.
And it's way harder to run a pirate AI datacenter than it is to set up a torrent tracker.
Laws will be written, license fees will be paid, and AI will continue to develop but with proper compensation.
Well not really, it's just freely available online.