Speaking as a professional digital artist, I am not very concerned by this. Images created by AI without comparable human experience (and therefore meaning), is not the same as art, although it can of course look like it. People who are more than casual appreciators of images follow and admire artists, and their translation of human meaning into an artwork.
I can see this eating into the commercial artwork market, which is bad news for the artists that rely on that for income, but it's not an existential threat to the meaning of art.