^^^
The current Pats are 27th in total defense
But they are 8th in total offense
Sure, that's one example. I will throw one back at you. What then of one of the greatest offenses ever seen in the Raiders when they met up with the Bucs in the Super Bowl. Madden isn't kidding when he says, in general, good defense beats good offense.
The offense is much more glamorous and fun for writers to get off on, but the trenches of defense, stopping the run on third downs, and putting pressure on opposing QBs is what wins games. It's not as easily visible or fun to watch, but when a D is doing their job, a good QB will have a bad day. When the Pats went against the Giants in the Super Bowl, most expected Brady to throw many touchdowns and get a lot of air. Who cares about the fact that the Giants held the Pats to low points? Do you think a lowly rated QB like Eli Manning made the difference in that game? Eli just had to have his regular mediocre passing day while the Giants D quietly made Brady look like he was a rookie.
See how the Pats would stack up against a top NFC team in the Super Bowl. Atlanta will kill them if the Pats enter the Super Bowl ranked 27th on D.
Brady is very talented, especially given his age, and he could play until age 40 and get another ring or two and maybe break some of Favre's records, but this will be harder each year if his D doesn't give him much breathing room.
The Pats can't expect Brady to make it into field goal range or get a touchdown on nearly every possession.