I think the issue is that the problem is being generalized into a 'one size fits all' sort of problem. When the issue is a bunch of items. Rural is an issue. But so is duopolies. So is poor competition. In the year 2000 I could pick from 20-30 different ISPs. Now I can pick from basically 3. Woe unto you if those 3 decide it is going to cost you 20k just to do a hook up or just say 'not available' even though all of your neighbors have it.
That's because the government forced Bell/AT&T phone lines to be leasable by other companies. Cable and fiber lines are _not_ required to have that kind of competition, which is why Comcast often delivers the only high-speed connection in a suburban area and can price gouge you.
Cable had that for a small time. But I think maybe 2 other companies actually did it. It is a mess and a lot of it I suspect is as you suspect. I think DSL lines had the same thing for awhile too but that got removed as well.
