We'll never know, just like we'll never know if Huard could have won that game or the SB. But despite Brady playing for almost entire half, the Pats had ZERO points to show for it.
The point is that Bledsoe DID come in for Brady after he got injured, and the Pats won the game, thanks in large part to the TD pass he tossed and not turning the ball over, despite the "almosts." The MAIN point is that the TEAM helped win the game, as they did all year long, and if the thinking is that even Damon Huard could have won that game, then Brady wasn't all that important to the team that year now, was he? IOW, Brady did not "carry the team on his shoulders."