Brady was 3rd in NFL MVP voting in 2003 with 8 votes, despite having zero offensive weapons and perks like Manning or McNair (tied with 16 votes). Even with of the games you brought up with the 2003 offense, the fact is that Brady still stood out as an elite player despite an anemic running game and very little talent. It speaks to how little talent the offense had when you have a clear cut MVP candidate unable to score a touchdown in four games.
Brady was elite; the offensive unit was not elite. Both of those things can be (and were) true.
The Patriots offense was incredibly weak and yet carried their weight, beginning at Game 3 of the 2001 season. "Nobodies and castoffs" don't work together to win Super Bowls. That's my entire point. What changed suddenly that those same nobodies and castoffs, 5-13 under Belichick, suddenly turned it around and went 14-3? Anything signficant stand out at exactly that point in time where they suddenly would become a .750+ winning team? Did the coaching staff become really smart overnight? Ty Law decided to carry the team to greater heights? Adam Vinatieri's new workout tape? Hmmm....
Law was the MVP of the 2003 team, and yet, the defense was fine after he got injured in 2004? I'm sure if Brady had missed a postseason, they still would have won a Super Bowl
Why did the team go 5-11 in 2000 with Ty Law? You know that comparing an all-pro cornerback is not nearly as valuable as a franchise altering quarterback. Not even worth debating...and not even unique to Brady.
The Patriots defense was great, absolutely. They were the stronger unit. But a lot of defenses that were that good - or even better - would never have won championships because their offense didn't carry their weight too. And the Patriots were a garbage offense led by an elite player.
Recreating history isn't the same thing as reevaluating history. Those people were wrong. Many believed it wholeheartedly, until Charlie Weis bumbled around just like he has previously, Scott Pioli came up bust, all of the "scrappy, clutch" Patriots receivers turned out to be minimially talented, and then Brady got some actual talent, dominated, and showed how ridiculous those takes were. The 2020 season is just another hammer to the remaining dust mites.