Of course, one begins with an understanding of the term "art" and works forward from there.
Hint: it is NOT "Ars pro gratia artis" which is the underlying principle..."
Regretably, you are incorrect. Art is whatever the HUMAN spirit finds it to be.
To quote Mel Brooks, "After the birth of the arts came the inevitable afterbirth of the critic."
Right. The "human" principle.
Ignoring all of Western (and Hebrew) philosophy on the subject of art does not make you credible.