It's Disney that are, by proxy, suing Stable Diffusion to create the legal precedent that you desire.
I firmly believe in "practice what you preach". I you declare you firmly believe in A but then do something directly counter to that because it's more convenient in this specific case, then that doesn't sit right with me.
Besides, further expanding copyright in this one area will only make it so much harder to reduce it later. And the pro-copyright folks will be able to say "you say you want less copyright, but you vigorously advocated in favour of copyright then, you hypocrite!" (and they wouldn't be entirely wrong, either). All this effort and energy fighting ML tools would be better directed at reducing copyright instead.
I don't disagree with your view on corporations. Do I like what CoPilot is doing? Not really. But at the end of the day: does CoPilot's or ChatGPT's mere existence really take away anything concrete from me? Am I harmed or even inconvenienced by it? Are my rights reduced? Is my code harmed by it? Is my income reduced? I don't really see how it concretely affects me, other than a general "feeling of unfairness".
And I see real risks with all of this: most regular people and small businesses don't have the resources to litigate as it's expensive and time-consuming, so a "license" that you or I slap on a piece of code is, realistically speaking, just ink on a piece of paper. GPL violations are rampant, violations of other licenses probably happen even more (but people generally care less about that, so not as widely publicized). Who will benefit with more copyright law on their side? The ones with deep pockets and many lawyers on retainer. i.e., the corporations neither of us like. Think creative new copyright lawsuits such "we claim copyright on the Java API" kind of stuff.
The simple fact of the matter is that Disney and Getty invest a lot of money into these materials being out there in the first place. Open source programmers and artists spend a lot of time producing works for no cost other than some minor courtesies.
AI companies aren't your friend or the little mom ''n pop shop down the road. Their technology giants backed by billionaires. When it comes to Disney versus Google/Microsoft, I'm against both sides if it means giving up my rights.
Big AI taking your stuff and ignoring copyright law isn't some kind of protests against copyright, it's the very opposite; it shows that copyright doesn't matter if you have the money to defend yourself in court. Violate the the MPAA's copyright and you get extradited, violate some random person's copyright and you should feel honoured that people even want to steal your work.
In my opinion, the idea behind the current copyright system works fine if the terms weren't so ridiculously long. Restrict copyright to five or ten years and I'd be fine with the whole thing. This "70 years after the death of the author" crap is the biggest stifle on copyright adds.