
Switzerland requires training courses and other regulations we don’t have have afaik, though not an expert, which likely helps a lot.
America as a non homogenous society, and always has been rife with divisions as well. These divisions easily, even subconsciously stoke fear into people, prompting a bigger draw towards self defense.
Early pioneer spirit also drilled it into the American consciousness. Needed a gun to defend your farm/animals from predators or other people when law enforcement didn’t exist or was hours away back in the day. Also leads to guns being in the family, needing back ups, a gun for every able bodied person etc …
So a big culture of self defense being the only viable defense for much of American history, consistent concerns about the “others” (for a large chunk of time also includes slave revolts), and relatively lax requirements (stemming from the other reasons mentioned) and boom. Crazy gun obsessed culture.
Idk. Lot of people hoped Luigi would spark a trend and that never materialized. Don’t fret too much