In general I agree with you, but that doesn't preclude the possibility that a coach simply has a bias that causes him to miss things. Jerrah likes him some really dumb physical freaks. Al Davis loved him some fast guys with no hands or route running ability. MM hates guys who make occasional mental mistakes even if they flash big plays. MM refused to use Desmond Bishop until he was forced to. Desmond was a difference maker on that D.
I can't say that janis or davis will be worth a shit, but I can say that MM is biased towards boring assignment sure guys who don't have the physical ability to change games.