If you waste your time and energy on things that don't matter in the outcome of the game, then when you get to the game you're not going to give your teammates the best that you have to offer.
We are all doomed to seek our own happiness; we can't help ourselves. We are all, the cruel and the gentle alike, condemned to seeking that happiness in the dark. We use our need as the blind use a walking stick, to determine the safety of every forward step.