The Super Bowl isn't everything. A few mediocre teams won Super Bowls. Trent Dilfer went from never losing as the Raven's starter and a Super Bowl trophy, to not being able to even get a backup job anywhere in the league the following year.
Anyone remember a few years back when the Dirty Birds made it to the Super Bowl, beating out the greatest offense in NFL history in the NFC Championship game? And then Atlanta stunk it up in the Super Bowl. Not only did Minnesota have a better season, but I would bet money that Minnesota would have put up a much better fight in the big game.
There have been some great seasons that didn't end in championships, both in team seasons and individual seasons. Who is more of a dynasty, a team that wins 2 out of 3 championships, or someone who makes 4 Super Bowls in a row, but never wins one?
I could see a strong arguement for either one.