The Jets create plenty of pressure through the blitz.
They blitz more because they have great coverage people. That's football 101. And those blitzes don't translate into sacks or even pressures. Watch them and you can see opposing quarterbacks have limited choices. It's not just Revis, either, but he's the main reason. New York just plays disciplined football, and Revis' ability to cover so well (and make QB's pay) allows the team's safeties to rotate the opposite way.
They stopped the best passing teams in the league because they have the very best coverage. End of story. They beat the Pats when it mattered most and handily took care of the Packers.
OTOH I knew before the Superbowl that the Steelers had no chance to beat the Packers. None. The Packers have great coverage and the Steelers don't, so there's no way they could keep up with Aaron Rodgers, no matter how great their pressure was. Not with those average corners and not in those perfect passing conditions. Pittsburgh usually gets into shootouts when they face great passing attacks, but the Packers defensive coverage is not conducive to winning a shootout. Sooner or later you will try to do too much to keep up with Rodgers and throw a pick. And they did (I even called the pick-6).
The Steelers got a bit lucky when the Packers lost two cornerbacks before the second quarter, otherwise it would have been a rout.
Why? Because elite QB's can beat pressure most of the time, especially if the coverage is lacking. Ball snapped, elite QB finds weakness, boom the ball is out. Or... ball snapped, elite QB buys time, shakes off defender, ball is out.
That doesn't mean cornerbacks are more important than pressure players-- not at all. In fact the right way to build a defense is to start with the line, find elite players wherever you can (preferably one at each level of the defense), and fill in the gaps with free agents. Why? Because pressure-based defenses will defeat most of the teams in the league because by definition most teams lack elite QB'ing. Winning most of your games usually gets you into the playoffs.
But when you get into the playoffs you must have great coverage to stop the best QB's in the game. You can have one average CB, but not two. You can have one average safety, but not two. And you really can't have any
bad players in the secondary at all.
They just can't be disguised like a weak Lineman or Linebacker can be. Sure a team can pound the football against a weak DT, but LB's can rush up to compensate. That weak DT might cost you 20 yards rushing over the course of the game. A weak DB can cost you over 100 yards and multiple scores in a game. The math does not equate.