No piece of art exists without context. With AI there is no context, no meaning, no relevance. A pretty image by itself is just that - a bunch of bytes displayed on device of your choice.
Isn't this the majority of the industry? Sure, maybe there are a few artists that can do profound work with context, meaning, etc. But when you're doing book covers for airport novels, you don't need any of that. Or when doing a website with a few images? You need a result that's good enough at the cheapest price. AI generated content is great for that.