Let's compare say car accidents. There are like a billion traffic laws, road signs, traffic lights to control flow of traffic, punishments for drunk driving and looking at phone while driving, etc.
Do you think more laws will stop car accidents altogether 100%? or hinder irresponsible or intoxicated or otherwise mentally disturbed (e.g. road rage) drivers?
Children shouldn't have to be afraid to go to school, and shouldn't have to worry about getting shot while they're learning, and no parent should get a phone call that their child was shot by a fellow student.
They are about as likely to be struck by lightning.