It's the hallmark of the "We do what we do" philosophy. We bet that our players can simply out execute the players on other teams to victory. Our philosophy is that coaches have no job to do beyond giving players a scheme and watching them execute it. The Don't Blame Garrett philosophy.
Romo often could out execute. More recently, the oline often could. But when you hit the playoffs, the rosters get better, and we can't.
Marinelli's "bend but don't break" is an extension of this. It counts on the QBs of other teams making enough mistakes for us to win. It doesn't fool them into making mistakes. It doesn't pressure them into making mistakes. It tries to out execute them, counting on the other team to make mistakes before you do.
Meanwhile, Marinelli got out executed *before* our playoff losses in 2016 and 2018. He was really pantsed in both games. For the first half in 2016, he had no answer to Rodgers going hurry up. In 2018, he had no answer to the Rams reading our dline. Pantsed.
On offense, teams adjusted to us in 2017, playing press man on our wideouts, and daring Dak to beat them. Linehan never adjusted. We just brought in a better wr. And our 7-2 run? We were actually outscored by opponents during that run.
Our average points per game only went up 2 points, to 22. That's middle of the pack for the NFL. With arguably the best RB in the league.