If the tree doesn't bare fruit, what good is the tree? That has been my argument. Belechick had all these guys get hired, and none of them, unless you include Vrabel, who didn't coach with him I don't think, has done anything. Noll didn't have a highly successful tree of NFL head coaches, neither did Lombardi. I just never thought much of it as an argument to validate Tomlin's lack of success. There were other, more important things than coaching trees.
I understand the quality of coaches thing, but are they that quality if when they get on their own, they don't do anything? Maybe the quality was with the head man in Noll and Lombardi's case, and it made everyone look good, and the cheating is what made them all look good in Belechick's case.