Brady's first extension after his rookie deal was actually pretty modest at 5 yrs for $30.52M, particularly coming off a SB win. For reference Drew Bledsoe had just been handed a 10 yr $103M deal from the same franchise just a year and a half prior.
Even his next deal in 2005, after two more SB wins and three total for his young career, was only for 6 yrs $60M. You can compare that to the deal Peyton Manning got the previous season for 7 yrs $98M, and his ringless fingers to that point.
He first
really cashed in in 2010, with a 4 yr $72M extension, after an MVP and 16-0 regular season.
And after Gisele.
source
Now I'm not making a huge case for Watson to just up and take less money. I wouldn't make that case for anyone.
The point is merely that Brady is a complete outlier.