Not having a democratically-elected government overthrown by a global superpower because of their location sounds an awful lot like luck. Especially when the superpower in question has a habit of doing so.
There's probably more to it. The USA is powerful, but it's not infinitely powerful. The same strong institutions that have kept Norway from falling to the resource curse have likely contributed to its ability to maintain its autonomy with soft power. If Norway's government turned into a revolving door of corrupt dictators, it's likely the USA would have a different approach for dealing with the country.
Norway has resources, strategic geographical positioning (North Sea, Arctic, Danish Straits) and has proximity to the (then) Soviet Union so the US couldn't afford to lose Norway to the Soviet sphere of influence. The US couldn't risk another Iran.
There's probably more to it. The USA is powerful, but it's not infinitely powerful. The same strong institutions that have kept Norway from falling to the resource curse have likely contributed to its ability to maintain its autonomy with soft power. If Norway's government turned into a revolving door of corrupt dictators, it's likely the USA would have a different approach for dealing with the country.