Isn't that a good thing? Since these models generate garbage output of very low quality, they will never compete with the high quality generated only by human artists. Therefore this is a passing fad and human artists will always dominate.

The worst result would be if these models were any good vs being absolute slop. Then human artists would need to worry. But in fact there is no need to worry at all, as surely people (aside from a few people with bad taste) will clearly see the difference.