Nice quote, but also wrong. The Swiss had tons of wars, both internally and externally [1] and provided many other countries' armies with their mercenaries [2]. Also, the cuckoo clock comes from Germany, specifically the Black Forest [3].
Full disclosure - I'm Swiss. As our history teacher put it: "The Swiss were always fighting, and if they weren't fighting each other they were hired by others and fought other Swiss mercenaries on the battlefield under different banners."