I can’t remember if it was a documentary or a book where there was a jam getting to the summit of everest because basically the people in front of the line were struggling to keep walking up. The expert mountaineer said, paraphrasing : Out of shape, under prepared, whatever the cause, every minute not moving at pace means someone behind them is more likely to die. He explained they were a moving road block and gave them a 50/50 chance to make it down, IF they had paid for help. He decided 30 minutes later to give up his ascent and telling guides and others on the way down that there people struggling and to turn back. At that elevation, walking is a struggle even with oxygen. Helping someone out whether by giving them your oxygen or helping them down could mean both die. I personally wouldn’t do it, but I hope whatever people go up the mountain know exactly that, if they can’t carry their own weight, they’ll be left to die.