One of the truly maddening things about professional football is that the most important position on the field has proven to be the most difficult to scout. Sure, the Seattle Seahawks (and every other team) miss all the time on a defensive tackle or wide receiver, but you don’t find nearly as many massive failures at those positions as you find at quarterback.
I suppose the very importance of the position plays into this problem. Teams – especially teams that have endured many years of mediocre play from the field general – are so desperate to find the elusive franchise QB that they talk themselves into things.