Yup. The way I look at it is that he often had good luck to win when he won and mostly bad luck to lose when he lost.
I mean, that's actually one of the craziest parts. You can double check this, but I'm 90% sure that all 7 of his SB's were decided by less than a TD, which generally means that one lucky play either way influenced it. That said, it may not be a coincidence that they usually ended up on the right side of it, knowing how to finish games offensively or defensively, and not just play 3 quarters, like the Seahawks, Falcons (or Jags yesterday), etc.