This brings up a good point. If it weren't for the bully Johnny Lawrence and his Cobra Kai thugs we would never have the Karate Kid. The world is a better place because of the Karate Kid, and we only have the Karate Kid thanks to bullying, so bullying has made the world a better place!
It is an enigma wrapped inside of a riddle.
How can we make sense of this?
Of course we don't want bullying, but in a way it is human nature. So I think the answer is simple, do whatever is possible to teach kids not to bully, but at the same time teach kids the martial arts in order to combat what bullying won't go away.
That way we have the best of both worlds, less bullies, and more Karate Kids to take on the ones that are left.