I disagree. First of all, people with issues are more likely to be found out in boot camp.

Second, you learn a certain respect for the firearm and are expected to observe strict safety rules when handling it. That gives you a kind of psychological flinch when you consider doing anything out of the norm with it.

It seems like tons of toddler are accidentally firing guns as well in America, so training probably won't help there.

Training people to lock up their damn guns would.