You have your opinions, I have mine.
I don’t think Banks is infallible but I can promise you he’s not teaching players to not stay in their lanes, to not cover a part of the field, to take bad angles. Position coaches prob more to blame for that than him but also it’s on the players to execute and be disciplined when they’re on the field.
Bad play calls go to Banks. But I’ve yet to see any VN football guru explain in detail the scheme Banks calls that doesn’t work and what specifically schematically the opposing offense is doing and then what specifically schematically the adjustments should be.
Heupel is a football coach’s son and safe to say he understands everything about intricacies of defense considering his offensive prowess, yes? You think if Banks is inadequate at teaching the defense that he wouldn’t do something about it? Not being a smart azz, asking legitimately.