Art is the conscious use of imagination to create something with the intention of it to be appreciated, experienced, and/or evoke an emotion in the observer. It requires one or two way communication between the creator and the person experiencing it.

AI generated images aren't art because there is no conscious creator who intends to create an experience for the viewer. If a future AI is conscious and self aware enough to have a will of its own, and will use it's own creativity to create something to be experienced or appreciated by the viewer, we would have AI art, but until then these aren't art.

Also, the banana taped to a wall or a fruit in a cage is art, though it doesn't mean it's good or not. Art that sucks is still art.