I am very uncomfortable with the idea of "this person or system cannot create, they can only steal". It seems very dehumanizing, and though LLMs aren't humans I could see the argument very easily turned on people. There is nothing specific to LLMs in it.
The people filling the wires with AI content they didn't write aren't fundamentally incapable of creation; they have chosen not to do it, and so are incapable only until they make a better choice.
It's not dehumanising to see the output of someone who isn't creating as uncreative.