And what if that doesn't work? I don't know you, maybe you could successfully fight back against your bullies; but that is not always an option. If your attacker is more athletic and much larger than you they might actually enjoy it.
The forum should have a goddamn Like button installed just for this post.
If you are being punched or kicked there's nothing wrong about fighting back, providing of course you don't do it in some completely wacked out manner (obviously, not savaging school bullies with a butcher knife in front of the maths teacher). Certainly if you do it it solves your problem (the bully goes off to beat on someone else),
Allow me to present an alternative to your cozy little fantasy: you try it, then you get your ass kicked, and then all the bystanders ask you why you're such a goddamn pussy you couldn't even stand up for yourself in a man to man fight (just because they happen to outweigh you by 20 pounds of muscle). The bullies will make beating your ass into a biweekly event while the teachers will tut-tut and ask you why you chose to instigate physical conflict. That certainly
solves the problem, and doesn't in any way reinforce the humiliation and anguish felt on part of the victim, who now has confirmation that he's indeed worthless.
and if enough people do it, it... well, doesn't eliminate bullying, but discourages physical assault and probably replaces it with emotional abuse, badgering, etc. There's lots of awful things kids can do to each other that doesn't descend to actual physical violence - which is where the role of teachers and educators is.
Or it continues without stopping even a beat, as it did when I was in school and mistakenly thought everyone's advice to fight back would be a solution.