50 and 53 are not exactly the same and the number I have on Peterman is 49.
When 55 is the preferred velocity for an NFL QB wouldn't you agree that every MPH slower makes a difference when it comes to limitations?
Peterman puts allot of air under most of his throws where as A J by way of example makes higher velocity throws on a regular basis.
In comparison to Peterman/ 49 Josh Allen can throw 15 to 20 MPH faster.
You can have success with lower velocity QB, of that I agree, but with lower velocity comes limitations in my humble opinion.