Because Finland runs astraddle some of the most strategically sensitive areas of Russia, including St. Petersburg... is why... We would never tolerate being encircled by Russia... why you and your paid Soros bots on here choose to ignore that, says a lot about your motives here. You want to destroy the USA, not oppose Russia.
EStonia is closer to St. Petersburg
Furthermore, Finland is an independent country and would have remained separate from NATO if not for Putin's invasion of ukraine
So go blame Putin
And the Russians, in that retarded way that they have, insist on maintaining unfriendly relations with ancient neighbors that “straddle strategically sensitive areas”, issuing routine threats and warnings as their principal interaction with anyone on their borders. Reflexive hostility is the principal Russian response to anything.
Russia cannot seem to see any independent country as anything but a threat. It is self destructive paranoia. It creates hate and fear among other people, for no good reason.
This crippling psychology of the Russian people has been holding the country back for many centuries, in both internal and external affairs.