It's a geometry problem. SFH takes up too much space.
You're absolutely correct that there's heaps of wilderness in the USA, but the more SFH there is, the more sprawl that is required, which means that that wilderness is further and further away.
I'd rather get to the wilderness faster and not have to drive through hours and hours of sprawling SFH suburbs.
Geometry has a solution! If you want to be closer to nature, move closer to nature. That seems a lot more reasonable than insisting that everyone around you uproot and reorganize. I'm strongly biased toward letting people live how they want so long as they aren't harming people (and I don't think "living between urbanites and nature" constitutes harm).
You're absolutely correct that there's heaps of wilderness in the USA, but the more SFH there is, the more sprawl that is required, which means that that wilderness is further and further away.
I'd rather get to the wilderness faster and not have to drive through hours and hours of sprawling SFH suburbs.