switzerland is a landlocked country with no port and no access, and barely 1 refinery. It depends on others for imports of oil, none which are direct neighbors. Switzerland has also very rugged terrain and weather , for which early car models were not exactly built for.

Contrast this with california, with the most important US port, almost 2 dozen refineries, and immediate access to oil producers. Pleasant mild weather in most parts of the territory, and flatland.

My point - Switzerland built its transport network to play to its strengths. So did CA.