B-b-but...
He can't win big games.
He chokes under pressure.
He's on a team full of Pro-Bowlers, they CARRIED him.
He can't handle the pressure of holding for a late-season, game-winning FG, either.
Nevermind that he disproved all of that from Day 1. You don't get to go from undrafted rookie FA to top 5 QB in the NFL if you can't handle pressure, especially if it happens under Bill Parcells' watch.