You asked a simple question: "Why don’t you name the elite, championship level defenses that have stopped offensive juggernauts? " I provided a succinct and simple answer. The argument isn't flawed because you said championship level and offensive juggernaut.
It's a perfectly realistic example.
You asked how much better would our D be with Many scheming around 3 Senior First rounders, but whose to say that Manny would even play them, especially if one of them had a "Bad camp"? And secondly, how many first rounders has Manny even recruited a first rounder in his entire career (seriously asking).
I'll give you a more recent one if you like. Just last week. VT shut down one of the hottest offenses in the league in Wake Forest.
The defense is okay, man. It's nothing special. We play in a horrendous conference with horrible offenses. We are padding our stats against nobodies. You really think our Defense would slow down an Oklahoma? Or even the above example of Wake Forest?