It's not just that, people will also throw paintings through img2img and just regenerate them and call them their own work.. It's very obvious once you notice it and recognize the painting that was used.
I have no idea how anyone could possibly defend this and think it's okay it's the most blatant form of ai theft.
It's literally just stealing someones painting and like throwing a filter over it and calling it their own, it's very not legal at all but it'd be extremely time consuming and tedious to pursue legally which is the issue.
It's why the government needs to step in and put a stop to it, it's unfair to expect individual artists to do it.