Thomas Shey
Legend
I've followed this discussion (which is actually pretty informative, thank you everyone!) because I'm really not that knowledgeable about AI art, but very interested in getting an idea of how it works and what it implies ethically. My takeaway at this point, from a purely moral standpoint, is:
What seems morally (and maybe also legally) wrong is using art without permission for commercial purposes (I'm not even sure if the question where and for how long it is copied/stored is that essential). That seems to be beyond the realm of fair use for me. Someone is taking people's art and training an AI with it to later sell the services of said AI, without the creators of the art seeing any recompensation. I don't think the question whether the resulting art could be considered plagiatory is that important.
It still turns on the idea that an AI that learns to do art is held to a different standard than a human who, using the same material to learn to do art, isn't. That's self-evident to some people, and anything but to others.