except the seahawks and niners both showed they could put up big points. when did the cowboys or broncos ever show they could play defense against even a middle-of-the-road offense? didn't happen
cowboys: 5th ranked offense, 26th ranked defense
broncos: 1st ranked offense, 22nd ranked defense
seahawks: 8th ranked offense, 1st ranked defense
49ers: 11th ranked offense, 3rd ranked defense
Hanging points on bad defensive teams is hardly something to brag about. Which both Seattle and San Fran did last year. Those stats are bloated. When they faced a legitimate defense they showed who they really were offensively. Which was just middle of the pack in reality.
When the Denver defense was healthy they held their own. Shut down Philly (2nd overall), SD and NE in the playoffs, but besides that they just had to be good enough. Team was never predicated on defense, only high powered offense.