The mind can be used to carefully calculate the useful value of a commodity. Should someone ask: what is the point? There is a clear answer that ultimately hinges on economics.
The same person can also sit quietly, traversing through the high country of the mind perhaps exploring the properties of a mathematical proof or deriving the theory of relativity, learning another language. Such endeavors seldom have any economic benefit. Should someone ask, what is the point? the answer is going to be strained.
Commercial art is done for the purpose of commerce and economics. The point is obvious. Fine art–art seperated from commerce–is uniquitous. It is found in every culture at every stage of human history. What is the point of fine art? If one can answer that then one will also be able to answer another question: What is the point of fine thinking?