It is hard to say that the art skill's price won't down, artist salary is hard to go up in the future, optimist should allow this point. But skill price have some fluctuate or even return to zero is a common phenomenon.

AI art actually imply that nobody can solid predict the ability that AI will be obtained, and the influence it will make. In the chaos of the AGI, anything may happen, and it is hard to consider that someone losing their job in this history event is a big thing, if gov even cannot process the unemployment, it will impossible to process AGI.

AI art is just robbing the artist job now, it is not a very big thing, if AI have a more powerful ability instead of just painting some pic, the big thing then will come.