Calling it "AI Art" gives it too much credence. They are generated images. Nothing more.
gofsckyourself
This one was actually really hard to track down, but I finally found the creator and the original

Then credit the author. That way people who enjoy it can know where it came from and may wind up reading his books.
So, yes. It was "stolen" as in plagiarized, since it does not provide appropriate credit.
Why would getting engagement matter on lemmyshitpost?
Don't ask for more pixels
Why? Because you're unable to use basic reverse image search or because you're too lazy and unwilling?

I believe that as it currently stands, AI is too closely tied to big corporations, especially for the average person. So, without specifically including the caveat of "this thing was generated using an open source, locally run model" or something along those lines, it's reasonable to assume it was generated by using big corp-run AI giving them more data and power over the individuals. I also think giving too much credence to AI gives the big techbro AI bubble more value and power. Additionally, AI makes it exceedingly easy for low-quality or nefarious content to proliferate and effectively choke-out thoughtful content, similar to how misinformation/disinformation takes over factual information. Like I mentioned, I agree that 'AI is just a tool', but that doesn't exclude it from being extremely frequently abused, which then puts a sour taste in my mouth. I could go on for why I tend to dislike AI in general while acknowledging what possible benefits there may be for it. None of my reasoning is founded on any of the claims db0 users were trying to force onto me.
According to your fellow admin and other very loud and rude users from db0 (whose behaviors have been validated by the same admin), that makes me a "right-wing neoliberal". Instead of engaging in a discussion about it, those people instead berated me and kept pushing the same idea.
/--edit--/
To add to this, I think a big contention point is that there is no rule against stating that you don't like AI or reasons to dislike AI, but the user's hostility were a reaction as if that were the case. If there were an instance or community rule for that, then these reactions would be understandable (though, still an overreaction IMO).
I'm gonna sin so good

omg they said the popular fad thing