Although not a political animal by nature, I can understand why Finland has joined NATO. It is the 31st member state sharing a very long border with Russia. It feels safer as a nation within NATO, knowing that if it was attacked all the NATO countries are duty bound to support it. It looks like the invasion of Ukraine has had the exact opposite effect with even more NATO countries on its borders.
Personally, I just wish all countries could live in peace and harmony as defence spending is, ultimately, a total waste of money.