Yeah, there isnt much of a difference as far as how the data is transformed between your pirating case and and the case of an ai providing copywritten material. It really is only because they treat it like an artificial person that they are able to convince people it should be allowed.
The kick in the teeth is, if I charged people for me to recite a copywritten novel, that I memorized but dont have the explicit permission to use, I'd be sued. There really is no way to argue this should be allowed that doesnt immediately fall apart if you pull it apart even a little.