Why did they burn the house exactly?
I got it that it was this big emotional moment but I have no idea why. It was mentioned several times that there are abandoned houses nearby. Why not move there? Why lose everything in the house you can't carry? Why not keep the generator and use the gas for something more useful?
The explanation given also made absolutely no sense to me. People will think they died in the fire? So what? If they're out in the woods, they couldn't care less what people think when they see the empty house.
And yes, humans have been living without electrified houses for almost all of their existence but they haven't been living without shelter and they had skills these girls didn't have. Why would they not at least try to survive a winter out in the wild before they almost literally burn all their bridges? These girls basically signed their own death sentence and the music is telling me this is some kind of uplifting climax to the movie? What the hell?