A machine might be able to make an objectively better thing, but that’s not what people are paying extra for. It’s the story about a real person applying their skills and effort to make it. Demand for that will likely never cease to exist. I bet it’ll just increase.
It all depends on the retail outlet. For “bigtime” art, yeah, the patrons chat with the artists, develop a connection… For more artsy-craftsy things, robots with calculated imperfections can replicate virtually any style that humans can produce. While an artist could paint 100 mugs by hand for an arts and crafts show, a successful artist might submit a program to an etsy style manufacturing center to produce 100,000 mugs in their “proven hot in todays’ markets” style for distribution to 1000 other resellers around the country to sell in their booths… Every one of the 100,000 mugs can be unique, but still in the recognizable style. And, buyers will be happy - until they figure out they’ve paid a premium for a mass produced “unique” item because they thought the old lady in the booth painted it herself.