Sorry, that last post was so long. Here's the short version:
I've been watching people here say for damn near to the whole 17 years of the Brady/BB era, "Wahhhhh we need a pass rush we need a pass rush."
They sometimes find the nut sometimes, like the blind squirrel, and the guy above who says "even when BB does have the weapons he doesn't cut them loose."
BINGO.
Of course he doesn't. Look at the results of the last 17 seasons. Nobody's against leading the damn league in sacks/pressures/etc. But we're not going to invest to that extent -- and even when we have the perfect pass-rush "piece," he's got other responsibilities, and those are not just "oh my bad" in the BB scheme. They're "Why the hell were you freelancing when you had responsibility for that gap?"
We do finish most years with good results, by the numbers.
But we are not built to sack the quarterback as the cornerstone of the defense, the easily measureable trait I used in the proxy discussion above.
What is less measureable is the ability to make a QB feel pressure, in combination with freaking tackling guys, stuffing gaps, and the ability to sufficiently cover receiving targets. One more ingredient which is huge for BB defenses: The ability to step it up with points on the line.
Fortunately, these characteristics appear to be what BB seeks. The pass rush is one of a set of tools to which he applies limited resources.
Denying points is the goal of a BB defense. He typically succeeds at it. That success is typically represented deep into the post-season.
So, meh -- on the "OMG I need a pass rusher so bad!!!" point of view.