I can’t decide if you’re trying to be gratuitously offensive, or are just very thick.
OP, assuming your slightly off mode of expression is not just you being a bot, the only Finns I’ve known fairly well are women who had already spent considerable amounts of time outside Finland, one of them my doctoral student, one, later, a colleague — also various people I met through them. I knew them in two different countries.
Two very different characters, unsurprisingly, but what they both had in common (and which might be to an extent down to a common culture?) was a kind of good-humoured self-containment and calm. I don’t think I would describe either as ‘introverted’, but I think the term is often misused on here — they were self-contained, didn’t feel the need to talk if talk were not required, independent-minded, well aware of their own needs. Unobtrusive physically but quietly good at outdoor things — skiing, climbing, hiking.
One married a very sociable, outgoing Irish man, and was clearly very charmed by his musicality and gregariousness. The other was contentedly single in her 40s and seemed very immune to social pressures about coupling. She had friends, but I used to see her often early on weekend mornings heading off solo to climb or walk, or to a festival. The idea of it being somehow ‘lesser’ to do something without friends (which you see so often on Mn) would have struck her as weird.
I thought they were both admirable. I’d adore to spend some time in Finland, which sounds v interesting.