I am wondering why is bullying illegal? It destroys the lives of many

I don't think it should be illegal really, as hard as it is and the effect it has on people, its not going to solve the problem or prevent it, because I as a suffer see it differently and wonder the reasons behind why people bully, and have some sympathy for them as hard as it seems sometimes they may be bullied or in a harsh and abusive environment or the way they have being brought up, yes it doesn't give them that excuse to do that to somebody, but still I think in schools. I where it should start, educating youngsters around bullying, and more intense work not just an assembly mentioning it, proper lessons, and also I think their should be help and specialist learning centres for children who feel its too much but by excluding the bully, all your doing is creating a problem for another school, or somebody else, you want to stop and prevent that person from bullying again, change their attitudes and help them as well as helping the victim, otherwise in both circumstances these problems will manifest and grow, and will stay with them into adulthood.