Yes I hate the new quote GUI, you have me there.
Accidents happen to the most careful people.
This kind of accident does not happen to the most careful people. A little kid got access to a loaded weapon.
To reduce the risk of this, you require gun insurance that requires that you agree to keep your weapon locked up, unloaded, etc. If a child is found to have access to a weapon, loaded or unloaded, it's a crime and the owner goes to jail or loses their ability to legally own a gun.
No it won't stop this from happening. But it will reduce the chances of it happening. As people around here are fond of saying, criminals break the law and law abiding gun owners do not, so if it's a law they will tend to abide by it, right? So this lessens the chances of this happening.
And this is all the right headed people in the US want, to make things safer and reduce the amount of times things like this happen. I'm getting a bit tired of the semantic absolutism around here.