Mmmmm...Definitely.
You could say it's luck Lad T stayed healthy all year. He gets a season ending injury in week 2, how many wins does SD have? Not 14. It goes both ways.
The question of who stays healthy over the regular season is an entirely different subject, though an interesting one.
My point, in case it's not obvious, is that any team can have a bad day. Your Pats, for instance, lost at home to the mediocre Broncos during the regular season. Does that mean the Broncos are a better team?