This is an excellent article, Rodrigo, and you pose a very relevant question. I have also worked in art galleries, and my wife has had work displayed in them. Honestly, I often scratch my head at some of the most expensive pieces. I am a big fan of the street art of Banksy and the like, and much of it is far superior than some you find on gallery walls. Look at the recent case of “banana duct taped to a wall” as an example.