How is that different from reality? You might buy a piece of artwork from famous artist X, but society and the market decide that art by Y is also valuable. Y

How is that different from reality? You might buy a piece of artwork from famous artist X, but society and the market decide that art by Y is also valuable. You might buy a painting because we all agree that paintings are valuable. But what's to stop framed original poetry, or sculptures, or photographs, becoming more valued and supplanting paintings as the preferred form of desirable art.