Not that I disagree but I had to dissect a poem by William Carlos Williams that was supposed to be a shopping list. Art is what everyone thinks art is. Which is kinda the point o the movie. It's all about perception, art, happiness, moral "uprightness" all of it.
Ads are not art. " sellouts"using skills they use psychology to market Brainwashing are solely exclusive to cults. Still the add is brainwashing, you are the aditional product they wish to mold.