You forgot half a dozen fumbles, a completion percentage below 50 and a 5 game stretch where he threw less than 10 times each. His “measurements” actually are terrible. He is, quite simply, not an NFL caliber QB.
I believe most if not all of those fumbles occurred in games he lost, and where he was behind and taking chances. He still had a winning record (the most important statistic) with a big playoff win over a 12-4 team.