Probably because "nice" is the antithesis of drama. Clean and beautiful, sure. But drama isn't about nice.
We cannot have a nice drama?
"Evil will always triumph over good...because good is dumb."
Dark Helmet, Space Balls.
I'm sorry, but most "conservative art" is too tame. Maybe not dumb, but tame. The market works. People like explosions and shit. For every Passion of the Christ's there will be 10 Pulp Fictions.