Cowher didn't wreck Ben's motorbike or infect his appendix.
Cowher didn't make Polamalu's shoulder trouble all year.
Cowher didn't fumble the first Bengal game away on a punt.
Cowher did take a 2-6 team and keep their fire alive, resulting in a 6-2 second half. Had the Steelers been able to win one more game (say the turnover-laden Raider game or the OT game against Atlanta) they would be in the playoffs. And no one would be talking about how Cowher "quit."