It's largely because Finland has never felt a need to be in NATO.
During the cold war Finland was firmly Soviet aligned despite all the claims of neutrality, the Finnish president, Urho Kekkonen, was de facto a dictator who stayed in power through Kremlin's support (although he wasn't really bad for Finland) and Finland had a defence guarantee from the Soviet Union in the form of the YYK-agreement.
After the Cold War Russia was expected to become a western liberal democracy and as such not a threat, and even after it became clear that it wouldn't become one people still understood it as a "known threat" and a bully which would act tough and try to intimidate but who would never actually hit you.
The largest reason for why joining NATO got a surge in polls is that most people weren't expecting the Invasion of Ukraine (I myself believed that they would've limited themselves to just Donbass and Luhansk).
I expect, although I may be wrong, that once people calm down support for joining NATO will fall, although the FUD spread by NATO supporters about how we would need to fight Russia alone if were not in NATO despite being covered by EU's article 42.7 may keep it high.
During the cold war Finland was firmly Soviet aligned despite all the claims of neutrality, the Finnish president, Urho Kekkonen, was de facto a dictator who stayed in power through Kremlin's support (although he wasn't really bad for Finland) and Finland had a defence guarantee from the Soviet Union in the form of the YYK-agreement.
After the Cold War Russia was expected to become a western liberal democracy and as such not a threat, and even after it became clear that it wouldn't become one people still understood it as a "known threat" and a bully which would act tough and try to intimidate but who would never actually hit you.
The largest reason for why joining NATO got a surge in polls is that most people weren't expecting the Invasion of Ukraine (I myself believed that they would've limited themselves to just Donbass and Luhansk).
I expect, although I may be wrong, that once people calm down support for joining NATO will fall, although the FUD spread by NATO supporters about how we would need to fight Russia alone if were not in NATO despite being covered by EU's article 42.7 may keep it high.