I think some of us might have short memories and are forgetting or downplaying some of JB's "line pushing" wrestling against Dake and many others through the years: hands to the face, hard clubs, dancing around evasively with time running out, pulling up his socks slowly for a breather, trash talking off the mat, and so on.
And in many (even most) ways that is just part of the game.
He's been a great ambassador for the sport but the point is: he is also a very, very, fierce competitor and comparable at times to someone like Michael Jordan, who would always look for the slightest advantages and ways of getting into the head of his opponents.
When you are older, you get savvier (and wiser) if you want to keep on winning.
When you are young, you also rely on your relative advantages, too, whatever they are.