This is very simply refuted: you're not one of the 5 strongest people in the world. Brady, Manning, were the best at what they do, top 5 in the world at the time they played and to this day.
When you're not competing with yourself, it's an entire world of difference.
edit: typo
what about everyone who uses Brady's system and also isn't the best? Does that refute Brady's system? Why choose the arbitrary cutoff point of top 5? Why focus on being the best when you'll definitely fail instead of focusing on being your best? If Brady could've been better if only he'd had a better rival does that indict this system?
My entire point is, fuck Bradys system. Someone will find a better one. Being pidenholed into weightlifting where there is only “one true way” is your blind spot.