This article isn't about coverage, it's about what goes in the duct if there is a connection. If Comcast can run a cable to your house, then they can put four strands and allow other ISPs access to them.

That said, how many of these homes have mains electricity? Landline phone service? If they can do that, then they can do fiber. Sure your cabin in Montana might not have it (though the equivalent in Sweden probably would), but the small town probably does.