So, use and support open-source AI models.

For artists able to afford a lawsuit against a multimillion company.

No. It doesn't benefit artists.

all artists will benefit because of the precedent that it would set.

No, these protections exist to maintain profits of large corporations. Copyright, patents, and intellectual rights were created under the false pretense that it "protects the little person", but these are lies told by the rich and powerful to keep themselves rich and powerful. Time and time again, we have seen how broken the patent system is, how it is impossible to not step on musical copyright, how Disney has extended copyrights to forever, and how the megacorporations have way more money than everybody else to defend those copyrights and patents. These people are not your friend, and their legal protections are not for you.

It wont do anything of the sort. Even if you accept the premise that somehow artists are being exploited from learning from their previous works, all that will happen is the AI companies will shift out of America to a juristiction that doesnt value extracting rents from IP above all else.

Abolish the abomination known as intellectual property
I hope both sides straight up die as a result of this
The end of the intellectual "property" regime
making infinite things artificially scarce
cannot possibly come soon enough
What was "intellectual property" should instead be paid up front by the people who want it
the result should be entirely unburdened of any sort of property, royalty, strings and DRM
ready to be infinitely broadcast and available to all
We're still going to want stuff and we're going to pay for it
We're not going to be vampirized by monstrous mice of the past
for 80 years after the author's death
now I'm off to piss, in Walt Disney's cryotank