So Bitcoin miners will just go to some out of the way village in Africa to buy electricity? I don't need to imagine electrical utilities, those already exist.

It doesn't make any fiscal sense to find some out of the way location with a small scale hydro generator to set up a Bitcoin miner. The amount the village would need to charge to make a worthwhile amount of money will certainly be above large scale utility rates.

The Bitcoin miner in remote African village story smells like someone taking advantage of some villagers. They're either paying them below market rate for electricity or indenting them with a Bitcoin mining setup that will barely pay for itself over years.