We know the hikers lost a day by backtracking. Also, their overall progress was slow because of the thick snow. Once they created the labaz, they took the high pass, not the Dyatlov pass. This was done to allow them to make a more direct dash to the lake and then around Otorten. The trade off was that their camp on 1079 was going to be a quick set up and take down. Therefore, no stove was set up. They would have wood and fire by the lake. It was only one night on 1079.
That night, Feb 1, conditions worsened on the hill and crushing snow fell on the tent, requiring them to " bug out" to the woods below for shelter and a fire. They achieved both things, but they could not defeat the Russian winter. It is one thing to go and shelter from a storm for a couple of hours, but if it doesn't let up, hypothermia, hunger and dehydration all occur. The group split up with three trying to get back to the tent, but Nature prevailed. In fact, there was no place to hide.
The DP9 were not reckless, nor stupid in their actions. Nature was the compelling force, but it was Nature in several forms. There was cold, crushing snow, sludgy snow, wet wood, rocky terrain, water and rocks. All these things came into play. It is unknown how each force acted on them, but the force was compelling and deadly.