I agree. Utilities should be billed in a way so that more expensive distribution costs for more remote areas are borne by those who live in such areas; if that makes living out there while connected to the grid infeasible, then people shouldn't do it.
I can understand subsidized infra for rural farms as a matter of food security policy[1], maybe. But these home aren't that, they're more "cottage in the mountains" kind of deal.
[1] That is, not endorsing it, but considering it credible enough to file under "reasonable people can disagree".