> You’d only violate copyright if you sell the models or the works they produced
That's not how copyright works. Academia would be able to claim fair use in expensive lawsuits. Hackers and tinkerers would be sued into submission exactly because it's a hobby that they won't risk jail for. People would be scared to work on anything related because of lawsuits threatening them with obscene amounts of money, and hence the retardation of science and the useful arts.
Other countries would leapfrog the US, and it would be left behind, all so that a few people can continue extracting rent with their government-granted monopolies.
That's not how copyright works. Academia would be able to claim fair use in expensive lawsuits. Hackers and tinkerers would be sued into submission exactly because it's a hobby that they won't risk jail for. People would be scared to work on anything related because of lawsuits threatening them with obscene amounts of money, and hence the retardation of science and the useful arts.
Other countries would leapfrog the US, and it would be left behind, all so that a few people can continue extracting rent with their government-granted monopolies.