Just watch the SB51 NFL Films ''Turning Point''.
Down 25, Blount says ''We got Tom Brady, we got Tom Brady, he's the GOAT, hands down, it ain't over''
Up 25, Taylor Gabriel says to Sanu who thinks it's over ''It's Tom Brady though''.
Brady motivated his teammates and they knew they had a chance to win every single game as long as there was time on the clock, and the opponents knew that it's not over until there were zeroes on the clock. A coach can give you a gameplan, but no one's going out there thinking ''man, we got that blitz package on third down, we're definitely winning!'' but when your leader is also the best player ever who never quits, then you always have belief that you're going to win.
That's the only reason why the mythological ''Patriots way'' worked. Brady led by example including taking it all from Bill, and everyone followed. Now there's no one to lead and all Bill can do is yell at the clouds because he has never been a people's person and without winning, there's no blind obedience.