That isn't what I meant. They had a good defense before Mack, but he's so good he takes a top 10 defense to a top 3 defense, if not the best in football. They solved the one weakness at that one position on defense they needed help with the best at that position. I completely understand why they traded for him. I completely understand the cost. What good does it do if the QB isn't good enough to win because of? The answer is nothing.
Repeat after me: Football is all about the QB. If you don't have one that is going to Canton, it takes the perfect storm to win a title once. If you have that guy, you probably will win multiple superbowls. You don't win more than one without a HOF QB. The Raiders and Giants were a fluke. Washington doesn't count because they did it with 3 different guys playing out of their mind for a season.