Brady says he likes balls at 12.5. That is the low end of the regulation. Take that ball into the cold rain...and it’s gonna get smaller. If 12.5 is “deflated” then you need to change the rule.
Also, do people think Brady was on the sidelines taking air out of the ball? Because that is they only way you can pin it on him. Show me some evidence that Brady did anything. You haven’t seen it because it didn’t happen.
From what I have read, 11 of the 12 balls were 2psi low. That means 9.5 psi or less.
But I understand your point - they shouldn’t be penalized because they got away with it!