Where do you think I'm sourcing these future complaints from the future haters of the KC Chiefs?
Belichick? Seriously? Super Bowl XXXVI, that game was won on defense. The Rams were superior to the Patriots offensively, it wasn't remotely close. Much better receivers and running backs. Belichick devised the plan for how the Patriots were going to chokehold that offense to give the lesser Patriots offense the chance at winning.
The Patriots Defense would go on to be massively important in Super Bowls XXXVIII and XXXIX.
Brady would be BRADY in the next 6 Super Bowl appearances. But Belichick's contribution there? Remember Super Bowl LIII when the Patriots were the second team in Super Bowl history to hold the opposing team to 3 points. That wasn't Brady.
Brady was huge (close to irreplaceable), but Belichick, his game theory, and defensive mindedness were also crucial.