Sorry for the long rant, but I feel like people are just looking at AI art the wrong way.
Remember clip art? All those preloaded images that you'd litter your powerpoint presentations with for some low-effort school project to break up the wall of text with "visual aides?" You know why you don't see that anymore?
Corporate Memphis.
It's a very low effort art style ubiquitous in big tech presentations. These are basically all churned out by some unpaid/low-paid intern with the benefit of being able to specifically match the presentation rather than searching through an album for something vaguely relevant.
The general theme here is that this stuff gets used where the artwork is not the end product, but simply a supplement to the content actually being presented. Given the topic of this thread, I think it should be obvious what the next stage is gonna be:
AI art is positioned perfectly to fill this role. You can, with minimal time investment, generate a scene depicting basically any scenario you want to coincide with whatever idea you're trying to present. There might be some kinks to it. But it looks a hell of a lot better than fucking Corporate Memphis. And you don't even need some underpaid lackey to make it for you.
Now, what does this have to do with porn? Well, the kinds of people gravitating towards AI art are the same breed who would otherwise be slapping real porn in their games. As much as some hate the practice, the images are just to supplement the story. AI has given these people, storytellers who are not visual artists, an inlet to the scene without the need to commission an artist to break up the walls of text they're actually producing.
AI will never replace skilled artists any more than assembly lines replaced skilled craftsmen. There will always be demand for expertly crafted furniture. But when all you want is a place to rest your ass, some shit slapped together by a machine works just fine.