Not hard to argue at all. Brady is good, smart enough to do whatever Bill tells him to do. The reason Bledsoe failed is because he tried to do it his way, tried to do too much, tried to force throws. Brady does what Bill tells him to do, does not force throws, does not improvise, just keep it simple and don't eff up.
The Patriots were 11-5 with a guy who never started a college football game at QB, a guy who was watching practice, who stepped in during the first game of the season with no prep. Sorry, Bill made that team, he has put together a group of winners and continues to bring in the right players with the right mindset. Brady has no idea how lucky he is (maybe he does)