I get what you are saying. I don't believe coaching is worth anywhere near 50% in any team sport. It is always the players especially when you have a transcendent, generational player like Brady or Manning.
He was 230 in high school. DeForest Buckner was 240 in high school. Pretty common to put on weight when you workout several hours a day.
Also, I wasn't even talking about JJs play. He loves the city of Houston and they love him. He has done tons for the community. Even with all that the ownership and front office got so bad, even he wanted out.