I don't think AI art is art (at most cases) but I think the same about "real" art

In my opinion art is created to share some idea to other people. It's more obvious for example for books but even for drawing you may want to show the beauty of the nature or, more straightforward, just draw a caricature.

The thing is that a big bunch of art created by people isn't art by this definition. If you draw an ad of something it's not art (it's not your idea, you probably even hate this product). If you draw furries for your patreon, you just want to get more money.

Of course the same can be applied to the AI art. I don't dislike it, if you like generating some default images, it's your right to enjoy it. If you think about the prompt, care about details and put some message in it, then it's art.