It isn't even about the players with the Steelers. Its about the mentality they've had for what seems like forever on the field and also about the coaching. They spurned two badass Steeler coordinators to bring in some random dude in Tomlin. Stupid move right? I don't know how they pull that off. Amazing.
I know it's a joke, but they do zone block, though, right? There's actually a lot of similarities between the Steelers' offense and the Shanahan/Kubiak offense.