Again, you're getting too deep where you don't need to be. You say "if art becomes a product" while I'm showing you examples from 500 years ago where people were paid to create some of the most famous pieces of art in history.
You're tapping into a single category of art -- art that is critical of society -- as if that's the only purpose of art.
The purpose of and the person who commissioned the piece of art is just part of the context and history of the piece. It says nothing of its impact and importance.