I disagree that you need to be academically developed but I agree you need a high level of intellect. From what I've seen, most people with a high intellect, who perform poorly academically, show intelligence in other ways and usually educate themselves in a way they need.
Mayweather is an intelligent dude , of course boxing for 20 fuckin years he probably isn't as sharp mentally as he used to, that's what boxing is.... sacrifice