5G is a red herring, as 4G would be sufficient. Before Westfield's fiber rollout, I drove around town mapping cell towers hoping to use LTE for home Internet. IMHO they're not really dense enough for such use, especially without directional antennas. Never mind the latency.

Also, Verizon is really the only provider that extends into the more rural areas listed, and I doubt they would want to cut into their mobile profits with the rates required to compete with wired access.