AI generated art tends to feel disjointed with reality. It slaps on the familiar, but it has no concept of beauty. Things will feel tilted, unaligned, and very unintentional, like an amalgamation of dreams. The quality will surely suffer if you go down that route.
I personally don't take issue if they're meant to be placeholders, concept art, or if you're experimenting with a change of ambiance before you invest into it properly.
However, AI art is not at that level of quality to evoke deep and complex emotions with your viewers. It shouldn't be used as a replacement for human generated art. I'm not saying that to give artists a job. AI Art really feels like it has no soul and is boring, even when you compare it to an artist that isn't particularly skilled.