You response is inaccurate. You can use CC0'd data to train your model, you can do it using your own gaming GPU, without incurring in more energy cost than gaming which is a socially accepted practice. And then, if you manage to train the network then there is all the difficulty involved with prompting until the network finally spits an imagine you are satisfied with.
@starsider
There is also the philosophical argument about what is creativity other just mixing already seen inputs, and Hume and Kant and bla bla bla. Imho creativity is precisely this, combining things that exist in novel ways, because ex nihilo nihil fit. After all, the human illustrator has learned by copying others too. In the end I do not see such a difference.