Watched a bit of Empire Strikes Back with my son, he says that if Luke had killed that white carnivorous creature instead of cutting off his arm, he could have stayed in the cave, maybe heating up rocks with the light saber, but instead decides to just run out into a blizzard instead of shelter in the cave from the cold. Leaving a communications device near the front of the cave Han probably would have found him and sheltered with him.
This is what it’s like having adult children. Damn.