Copyright doesn't require a single bit of input to be shared. You can't avoid copyright by using a paintbrush for example, you're simply creating a derived work

Copyright doesn't require a single bit of input to be shared. You can't avoid copyright by using a paintbrush for example, you're simply creating a derived work. You might still be in violation even if you create an entirely new context around the copied elements or substitute for the original in the market, as was the case with Warhol vs. Goldsmith. Obviously not every generative output is a copyright violation, but it seems equally clear that there are outputs that would be if they were produced by humans.