It’s weird because Switzerland is one of the most armed countries in Europe, as in they have firearms but barely any shootings of any kind (so you don’t often hear news equivalent to a guy shooting students in a classroom or killing people at a shopping mall over there). Part of it has to do with the draft (most people who purchase firearms have a form of training, as they learnt how to properly handle them during military service).
Nope. The gun is government property, stored alongside uniform and other things at every reservists home. In case of an attack, they will assemble at predetermined locations and supplied with ammo. Same with training. And woe to you if you use the gun for private purposes.
So the reason is sensible gun laws
In a way, yes.