Its not that I don't want a discussion but instead of engaging in one you're telling me to go and watch what happened on Sunday. It changes year to year. Not too long ago everyone thought the league was changing to where you would need a mobile quarterback in order to win. A few years later Peyton Manning, the most immobile quarterback in the league is in the Super Bowl......
The Giants were the 25th ranked defense the year they won the Super Bowl in 2011 and in 2007 they were the 17th ranked defense. So what are you chasing year to year? What are you trying to emulate. Always trying to emulate the last winners and then the next year a new team wins and a different way then the previous team won. I just don't understand it. The Cowboys should try it. Just go in build your team THE RIGHT WAY which is on the line of both sides of hte football. They have one side set. They need to get to the other sides line. Start from the line out. Then worry about fixing wide receiver which needs improvement but doesn't really need fixing.
Fix the defensive line...try Gregory, Lawrence, Crawford, and Hardy. On the offensive side, the acquiring of Smith, Frederick, Martin, and Collins a pretty determined shot at both front lines.
As to a rewrite of history, the Giants were definitely known for their defense, as were the Ravens and even Green Bay when they were competitive.
Go back and look at the dominant years of Cowboy history, and they demonstrate a very tough and competitive defense.
As to successful top shelf Cowboy teams, look again, they had two top shelf players and the asking prices for them were in the first rounds for both receivers...go back and look. Start with Irvin and Harper.
As to the 'magic show' you imply, when defenses that reach the final match aren't top notched, the determining factors then shift to mistakes and top producing offenses. But that is when a defense by either team, isn't really top notched. But the rule of thumb is, in the playoffs, defense carries a team through.
Mobile quarterbacks have never been in disfavor, but when the rest of the team wasn't strong enough, the quarterback running around just lasts so long. What does change games, is a vertical and effective passing offense and a strong/pounding running game gains advantages.
One doesn't merely find a workable category and go with it...and expect to win. Ask Philadelphia about that. Or the Giants when their defense falls beyond acceptible levels.