It's funny how a number 4 pick can have a career that is sporadic between some huge games, some meh games, some "not much" games and some injuries, contribute to a Super Bowl win and sign some decent contracts, but still be considered a huge bust by some and "ok" by others. You won't find anyone assuming he is a critical piece to anything whether he can be or not.
Contrast this with the consensus greatest draft propspect of all time who had a career with some solid stats, never really sniffed a Super Bowl, choked in a bunch of critical moments, had several injuries and retired extremely early. Call that guy a bust and holy terror will rain down upon you forever. Even after a career full of false hope and disappointment, we're in for a decade or so of imagining what could have been.
Perception is more real than reality sometimes.