They aren't, but Scandinavia may as well be. The only land border is an icy, barely-populated taiga controlled by an extremely authoritarian, violence-happy enemy of the West. My bet is crossing that border is _significantly_ harder than the US-Mexico border

>The only land border is an icy, barely-populated taiga controlled by an extremely authoritarian, violence-happy enemy of the West

Finland isn't that bad

they do have a bridge to Denmark now, though.

People say this about both Sweden and Iceland and it's not true for either of them.