The director Damien Chazelle's notion of artistic power isn't merely inseparable from his notion of will power; it's the very embodiment of it"louder, faster, and alone are his standards of musical quality. The drummer in his 2014 film "Whiplash" doesn't play well with others. He practices obsessively in his room until his fingers bleed; he doesn't jam with his classmates or sit in with other musicians in clubs or ba…
