Science Fiction writer, and poet,Ursula K. Le Guin, said:
dictators are always afraid of poets.
I think this is the sort of statement that sums up what you are getting at. Art is true expression. Often what needs expressing the most is that which runs contrary to popular culture and the norm. Thus art is a form of rebellion open to all of us.
Deep thought!
Thanks for your input. The tough rule of dictatorship govt. is what triggers rebellious art, which also reminds me of the Soviet Nonconformist art or the degenerate art museum in Nazi germany. The history of art and rebellion goes deep and element of such can be found in underground or street art today.