Good point, it doesn't make much sense to do that either.
> The economic benefit of making those people available as consumers, lowering barriers to their engagement in markets, is enormous and certainly pays for itself.
Or, we could zone areas to encourage people to live in towns where it's feasible for both corporations and the government to provide infrastructure and services at a reasonable cost.
I have not worked in water/sewage, but the characteristics are quite different compared to electricity--electricity cannot be stored, it needs to be sent directly from the power plant to the consumer at the exact moment it is consumed, but on the other hand electricity can be produced more or less on demand with the quantity limited only by your willingness to pay. Water is finite, and is simply being managed by the utility rather than created on demand. Someone collecting rainwater is still impacting the local water system and depending on the environment this still needs to be managed by someone.
This is assuming there isn't a good reason why we might want some percentage of the population to be rural. To have farms and ranches, for example.
Trying to create an elaborate regulatory regime to decide who is justified to live in a rural area is absurd and a waste of money. Especially considering that most people living in rural areas are either employed in a necessary industry that needs to be rural, or work in professional or service industries either directly supporting said rural industry (e.g. tractor repair) or indirectly supporting it's workforce.
Furthermore, the marginal cost of providing broadband to all those "slightly-less-necessarily-rural" people is minuscule. Skipping every other house doesn't save you much when the majority of the cost is building infra to get broadband to the town/road in the first place.
They can be in a small town in the region, which is where the school and liquor store probably already are.