Well it obviously is a Brady-Manning comparison because the only people in this thread arguing the other side just happen to be Pats fans. Coincidence? I think not.
The Patriots' teams earlier in this decade were known for being excellent defensive teams and obviously well coached. Their offenses were never more than above average in any facet of the game. Brady clearly isn't stupid and doesn't lose games for the Patriots, but he certainly never played a huge role in winning a ton of games either.
Whether you want to admit it or not, the Patriots may not have won one ring let alone three if it weren't for that fucking tuck rule game. Obviously they went on to win the Super Bowl so they obviously deserved it, but that was all in spite of Brady, not because of Brady.
I'll be the first to acknowledge that the year the Colts won the Super Bowl that Manning was only half of the reason not the only reason the Colts were successful in winning the championship. The defense played phenomenally throughout the playoffs including the Super Bowl even when Manning was struggling. That's what good teams do, and that's why Brady has 3 rings, and that's why your argument is completely moot.
edit: Obviously.