This is not fact. That is only true for Dallas last year. In the past 15 years there have been multiple backup QB'S lead their teams to superbowls and won. Just last year Pittsburgh won with Vick and Landry Jones. Indy won with Hasselbeck. The Texans won games with multiple bad QB'S. If you have a solid team on both sides of the ball you can survive without your starting QB. There was clearly a bigger problem other than Tony getting hurt. I'm hoping were more equipped to win without Tony this year. If it's all on him to make all the plays, we're screwed anyway.
I didn't say all teams, I said most. If you've got a good backup, or if you've got a really good defense you can still win the passing effectiveness differential game, sure.
We don't really have either of those though. And last year was definitely more than just losing Tony Romo, I agree. We lost multiple offensive playmakers, didn't take care of the ball, couldn't take it away, and lost 11 close games on a series of penalties, gaffes, mental errors, and bad officiating. We wer snake bit from the start, for sure.