"Backpacking" in the US is conceptually and vernaculary different from trekking, not to argue something you probably know already and aren't claiming. The guesthouses in these countries were also government sponsored or owned-outright in my experience. There's an economic benefit to providing employment for the caretakers and of course for foreign tourism and even local travelers.

Maybe highway rest-stops are the closest analog for the US but even many of those have been shuttered by governments driven to parsimony.