Too bad. Many, if not most, of those objectives are legitimate. Teaching, selling, creating, all are entitled to a place in the world of art. Each is a part of what art is , not the whole.
An economic view of art does not replace aesthetics, criticism or art history. Rather it compliments them. It looks at the activity of art in a way that is much different, hence it sees different things, and if used properly it can be informative.
Wm.D. Grampp Pricing the Priceless
There is no single answer to the eternal question “What is art?” For me, art is a Swiss army knife. What do you want it to do for you?