Can art flourish without rules to brake?

Brain farts, Knowledge stuff
What do we fight for if there is no-one to fight against?

Art is dead.

That statement may be a little bit exaggerated, but art is certainly not what it was. But what is different? What is the difference between Kim Kardashian’s Selfish (2014) and Pablo Picasso’s Guernica (1937)? What is the difference between John Kahrs’ Paperman (2012) and Jan Švankmajer’s Leonardův deník (Leonardo’s Diary, 1972)? Between Lars von Trier’s Melancholia (2011) and Idioterne (Idiots, 1998)?
You may say I am exaggerating again (and I am), but there is a difference. Art used to be a rebellion. Art used to shock, to confront, to provoke, to fight. I am not saying that there are no artists out there today, because there are, but the public does not care (about their messages).