No one is arguing everything is perfect. The argument is, given the players they have, are they performing well. I think so.
Comparing them against an imaginary perfect defense just shows a weak argument.
Actually the argument in this thread is against:
1) An incorrect assertion that the defense has relied only on turnovers, that there is something wrong with getting turnovers, and that the ability to produce turnovers evaporates in the playoffs
2) Ignoring the fact that the defense has played very well in the 2nd half and 4th quarter preventing points when the game is 'on the line', and the fact that almost every other contender has not done nearly as well in that area
3) That other defense have been consistently and dramatically outperforming this one all season long.
4) That is it a stupid argument to ask what will happen to the team that scores the most points in the NFL if it stops scoring points.
but even sillier to imply that the offense will all of sudden do something entirely different than what it did all season and apply what the defense did all season to what the result would be.
The argument has never been that the defense is more than it is. The argument has been that you cannot take selective cumulative statistics over the course of a season in very different circumstances and apply the average of them to make a case that the defense will fail in the clutch.
3rd down conversion percentage, total yards allowed especially with a large lead and other cumulative stats are not as good of an indicator of what a defense will do with a 4th quarter lead than what that defense actually did with a 4th quarter lead, and the fear of that situation is unfounded when the exact teams that you think will take advantage of it have performed worse in that situation.
If the concern is that the 2010 Patriots couldnt win a SB with an average offense, well, duh, this was a total waste of time.
The point is that this defense only needs to win in conjunction with THIS offense, and the greatest strength this defense has shown is that it plays its best in situations where the game is close. For some reason, some posters want to dismiss that good play when the result of it is to increase the lead, which makes no sense to me.