The cases are so contrived they do not happen. Just think of the situation he's proposing: your neighbour who you apparently trust enough to give a loaded gun too, to potentially kill a person with, does not have a gun themselves but apparently is completely capable of using it?

And you know, this problem has to be solved right now: too much of an imposition to look out for them while they go and buy a gun from one of the numerous gun stores - but giving away a loaded gun, that's what you want to do (no one would do this in this scenario).