Why Must Aesthetics Govern a Society Worthy of Political Freedom?

Is it true that BachÔÇÖs Jesu Meine Freud or MozartÔÇÖs Requiem should be treated as somehow equal to the ÔÇ£sophisticatedÔÇØ atonal music of the 20th century? Should a painting by Rembrandt or Davinci be treated as equal to the ink splatterings of Pollock or the blurry squares of Rothko? What happens to the powers of judging right from wrong, and truth from lies in a society which embraces an art which is animated by love and beauty vs an art animated by pessimistic ugliness? Which type of society would be easier to manipulate?