I'm not sure the logic follows. Music can be copyrighted, and it can also be made from samples from other music that's copyrighted. But sampling still happens

I'm not sure the logic follows. Music can be copyrighted, and it can also be made from samples from other music that's copyrighted. But sampling still happens without infringing copyright. I'd say the small handful of bits flipped in a model from training on some text, or piece of code, or an image is even less copyrighted information brought over than a music sample or borrowed/referenced melody.