My conjecture is that when the hikers levelled the base for their tent,they cut through a layer dividing two snow densities.. When the overburden became too great, the upper slab slipped, covering the tent. The hikers cut their way out. Next came a decision. Perhaps they reasoned that clearing the tent might release even more slab on the 30 degree slope. Perhaps gale force wind was not going to permit any pitching of the broken poles and cut canvas.Additionally, out of the tent, did they actually have a choice to return to it? A cut tent is not a warm tent, and again, the slide that caught them the first time could certainly continue to cascade down on them.
Arguably, even if they did clear away snow to retrieve supplies, perhaps the idea developed that another slide obliterating the tent completely might mean they would never find it. If buried and marked by a ski or two, it would be a very small target, especially if their foorprints got blown away.
Certainly, they are not going to have an easy time of getting to Vizhay on cached supplies only. Additionally, while digging, they are not making fire nor sheltering from any winds, up to hurricane force. The flashlight on the trail to the forest suggests they moved in darkness. This reinforces the uncertainty of their circumstance. Their strength lay in their free will to choose what they will do next. The choices were few. They could stay put, retreat to Boot Rock, make for their cache or descend to the woods. Of these options, the woods was chosen.
Once they agree to leave the slope, there is no turning back. Why? Turning back does not change the circumstance of their departure. No, it is all about getting to the woods, making fire, getting out of the wind and attempting to mark the trail back to the tent and home. If indeed there was a regularly passing aircraft, they could lay out three lines of cuttings in the snow.
As Sr. Maldonado points out, time is of the essence. Stalling at the tent is just running the clock down. My guess is that there was no real discussion about leaving because their survival did not depend on remaining at the tent, but instead it depended in leaving it. Even at that, we know that each one of them started to shut down. My suspicion is that the weather did not abate. It was savage when they left for the woods, and savage in the woods. I think it reasonable to assume that some of the injuries happened on the way down to the cedar.
In other discussions, there has been the hint that geologists had some indirect involvement with the disaster. Is it not curious that any testimony by geologists is wholly absent from the case? Also, if the weather was as bad as I suppose it was, who is going to be flying a light fixed wing airplane in that?