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).
Same with hard drugs, and the associated crime… they’re a symptom, not the root cause. Hard drugs are used to escape reality. If there’s fewer reasons to escape, usage drops dramatically.