It turns out that servicing 100% of the population isn't practical when people choose to live in very remote areas. I agree that it would be onerous for carriers to have to service 100% of the population with any kind of service, but I disagree with the current standard on non-copper services which amount to something like 80% of population within a given metro zone. It biases too hard towards city living, especially as we are seeing more and more people move away from cities.
Rural broadband in America is extremely difficult in most parts of the country, way harder than it needs to be. And don't get me started on WISP vs hardwire, hardwire is the only real internet and don't let anyone fool you otherwise.
Source: 10 years in the belly of the beast of telecom.