Why is this not taught universally.

Some kid at my work tried to rip my shorts down and I knew he was going to try to when he passed by and ever so nonchalantly I said “try it and I will break every bone in both of your hands” and he asked why (terrified cause he could see I wasn’t kidding) and I simply continued working and told him “cause you cant touch anyone if they’re both shattered and casted now can you?”