That's true Beamtr but even if you took Sweden you're still stuck with Denmark in the way - then if you take Denmark you're in the same situation pretty much as Germany was in WW1 - you've gained access to the N Sea but not the Atlantic - so you finish up having to invade Norway and the UK (or just Scotland)
Anyway its hard to see Russia starting with Sweden - they'd try the Baltic States first and, if they really are stupid Finland...... that's like invading Afghanistan or the Yemen - you can get in easily but can you get out? Even Stalin got burnt there.
I suspect the Russians would be very happy if the Swedes were as effective as the Swiss - armed forces go home for the weekend, don't ask too many questions and just not bug the Russians as they try and go about their business elsewhere