There is at least three major art markets: 1) pretty pictures to fill in a void (empty walls, dress up an article...), 2) prestige purchases for those trying to fill that void in their imposter syndrome, and 3) fellow artists who are really philosophers working beyond language. The whole reason art is evaluated with vague notions like taste, context, history and so on is because the work of artists left their audience's understanding several generations ago, but they still need to make a living, so these proxies are used so the general public does not feel left out. Serious art is leading edge philosophy operating in a medium beyond language, and for what it's worth AI will never be there, just like the majority of people.
There’s an even deeper issue, not just for art, for all things.
The majority of artists, and of all other groups, are in fact mediocre with mediocre virtues, so enough incentives would turn most of them into Whatever shillers like the post describes.
So a non expert cannot easily determine, even if they do stumble upon “Serious art” by happenstance, whether it’s just another empty scheme or indeed someting more serious.
Maybe if they spend several hours puzzling over the artist’s background, incentives, network, claims, past works, etc… they can be 99% sure. But almost nobody likes any particular piece of work that much upon first glance, to put in that much effort.