It’s because all the performances are imperfect. A dense, artistic imperfection stimulates your consciousness, keeps you alert. If I listen to some utterly perfect performance of an utterly perfect piece while I’m driving. I might want to close my eyes and die right then and there. But listening to the D major, I can feel the limits of what humans are capable of – that a certain type of perfection can only be realized through a limitless accumulation of the imperfect. And personally, I find that encouraging.