It works sometimes but real life isn't like those coming-of-age pictures where the kid finally stands up for himself, the punk gets knocked out and everyone cheers and he never comes back.
Other times he takes his lick but he's not deterred, he comes back. He comes back with friends. He or they come back armed, with knives or guns.
If "boys will be boys" ever "worked" I don't know but it's a recipe for disaster in the 21st century US with 300 million guns floating around. Someone's gonna go home and get a gun I've seen it happen.