Verbose
Deity
At the time of the loss of Finland about 25% of the population was Swedish speaking, the entire social upper crust generally as well as several distinct geographical areas (some still are, though dwindling), and Finland had been the eastern half of the kingdom for some 600+ years. To Swedes in 1809 the duchy of Finland was very much an integral part of the kingdom.In all fairness, the only border they shared is a fairly remote one way up north, where no-one really lives, let alone lived, except for the Sami. Half of it's in the mountains, for a start. The heartland of Finland is far enough south that Sweden may as well be an island from it's perspective. After all, Ireland, a handy comparison, was not a "colony 1,000 miles aways" from the UK, but it was hardly part of what would really be considered the English "homeland". The Irish War of Independence didn't have quite the same effect as, say, Dorest declaring independence would've done, and so I find it hard to believe that the loss of Finland, a geographically disconnected and ethnically distinct nation, constitutes a loss of any part of the Swedish "homeland".
When looking at the "disconnect" you are looking at the water in between Sweden and Finland. Well, historically that's "connect", since travel by water was historically multiple times more uncomplicated than travel by land in Sweden. Looking at historical "ease-of-travel" Finland was de facto easier to get to from central Sweden than the counties south of the dividing forest of Tiveden, which literally cut the country in half, and marked the dividing line between the original kingdom of the "Svear" to the north, and the two kingdoms of the "Götar" to the south. Above and below the Forest to Swedes was historically more distant than the short hop by boat to Finland.
The problematic and dangerous border was historically always the land border with Denmark in the extreme south, that is until the border change in 1658, even if the conquered new southern counties were occasionally fought over until the Great Nordic war in the early 18th c. (at least two serious Danish attempts at reconquest). Denmark was the obvious arch-rival, and the 17th c. wars were extremely bitter and brutal affairs.
Sweden in 1561, first real conquest, Estonia (lasting until 1721):

Sweden waxing and waning in historical maps:
http://images.google.se/imgres?imgu...org.mozilla:sv-SE:official&sa=N&start=18&um=1