You're also underestimating the amount of great quality art that simply doesn't sell. Hence the power of marketing. And the art that sells for lots and lots of

You're also underestimating the amount of great quality art that simply doesn't sell. Hence the power of marketing. And the art that sells for lots and lots of money is also marketing and financial gimmicks the art world does behind the scenes. Unfortunately it's not quality that matters, it's the notoriety of the artist. It goes back to marketing in circles.