But it's not everything because all players don't start with same baseline and not all mature at the same rate. In you're continued comparison of goff and stafford you assume started at the same level and progress at the same rate. Its a faulty assumption. For example, I think its fair to say mahomes is better than just about any 13 year vet. Bottom line is that all rookies don't start at the same level and then some improve fast while others need time and others simply top out at some level.
