A-frames are often used in snowy climates as a vacation home, park ranger patrol station, or https://en.wikipedia.org/wiki/Wilderness_hut. Such buildings are un-lived-in for much of the year, if not "indefinitely until needed." The building needs to survive, not being crushed by snow, without any human supervision.

As TFA emphasizes, grid electricity is unstable in rural places in winter; which means that even if such a building were able to be grid-connected (often not), and even if the building's owner was willing to spend electricity heating the building year-round in their absence (almost certainly not), the building would be likely to lose electricity at the worst possible moment: when there's tons of snow piling up and no humans there to shovel it.