By the time a QB was 35 or 36 he was shot in the old days.
Rule changes have added 5 years to guys' careers, and that's good for the game.
The difference between rings and stats is that no matter what, nobody can ever take your rings. All these passing records will be gone, especially if the league goes to 17 games. They used to play fewer than 16, which always gets mentioned when talking about guys like Jim Brown and his stats.