Attending a fight doesn't necessarily mean "studying". Mayweather attended Pacquiao's fights too, I don't think he was studying him.
Don't you think it was one of the perks of being a top rank fighter, you can watch their cards for free.
Mayweather has a delusional personality rooted in having everyone around you kiss your ass for your $. Take the $ out of the equation and he is not quite as cocky and still dumb. The guy talks like a child when he actually tries to make sense.