That's classical victim blaming. We are all humans and make mistakes.Some mistakes only result in some property damage or money lost and some, like running over a person (doesn't even have to be a child, don't forget that there are handicapped people who might not be able to react fast enough to get out of that situation), can't be corrected afterwards. Handwaving that away because some people like to save a few dollars is not a great idea.

By your logic we could also hand everybody heroin and an assault rifle and abolish most laws, people watch TV after all and therefore can be taught not to do bad things.

This is true. Any kid who is capable of naming themselves has also opted out of child safety. The two characteristics are irreversibly linked.

In addition, the existence of kids who are capable of naming themselves must mean that other kids should be bumper mush. This is the only way to preserve the American Way.