AI is only the latest digital tool. It's not different to any other digital tools.
Unless you meant that only analog art is art.
And then, we should question if any art that uses any type of tool or support other than the same artist, is by that definition art.
Is it art when you depend on a durable canvas and an advanced chemichal industry that produces pigments, instead of blowing your handprints on a cave using charcoal dust and animal fat?