The state of their tent was such that they abandoned it for the forest below in the snow slab theory. But yes, any motivation from that night is speculative, in

The state of their tent was such that they abandoned it for the forest below in the snow slab theory. But yes, any motivation from that night is speculative, including the one where Igor decides to pitch the tent on the slope because he doesn't want to lose progress the next day, or that he wanted the group to challenge themselves.