The same holds for AI art.
People will pay more for the original because it's rare.
If an artist who studied Van Gogh intensely made an original piece in Van Gogh's style, does it have equal artistic merit as one of Van Gogh's originals?
AI is just going to be another aspect of provenance, and if it's found out an art piece had AI used to make it, it won't be forgotten or ignored.
I find it similar to watching chess. AI/Chess engines will always be better than humans, but it's exciting to watch a human play to see what they can do.
For example, a woolen blanket made by my mother is much, much dearer to me than an equivalent woolen blanket made in a factory.
I see it very likely that certified-provenance human-art may command high prices in the future; but also for physical part, it's pretty trivial and doesn't have to be so posh and fancy - anything from street art to art galleries and art collectives/workshops.
The problem isn't for existing artists (except in terms of ethical issues)—it's for new/budding artists, who will have to contend with challenges to the authenticity of their work. How can they prove that they put their blood and sweat into making a piece of artwork by hand when an AI could've generated something equally passable?
The art is always human-made. Missing attribution doesn't mean "machine made it". Humans developed the AI, ran the AI, created the training data, picked the non-horrible sample from the output, etc.
It doesn't matter anymore that you emotionally value, or want to emotionally value, human-made art more than AI-made art, if you can't distinguish the two except based on other people's representations of how it was made.
Unless you watched a (non-augmented) human make a piece of art, you have no assurance that a human didn't touch up an AI generated art piece or simply curate a collection of fully AI-generated art.