At that altitude, you are lucky to get yourself down. One simply cannot assist others when oxygen is 33% what it is here. I have been to 18,000 feet; that is over 3 miles straight up......cannot imagine these altitudes.
Sure you can, pack them on a sled and go down the mountain........
But that will never happen since their own personal narcissism and the desire to make the hike up the mountain takes precedence over the life of a fellow walker.........
Oxygen is still 20%. The air pressure is much lower. I remember ~623 millibars at 14,000 ft. Sea level is ~1013 millibars. What gets to you is the lack of Cellular level pressure differential. Oxygen won’t move into the cells as efficiently. We used one of those things they put on your thumb to read heart rates and Oxygenation levels. My best reading on the sumit(14,000 ft)was ~78%, my worst was 72%,
same body, different days. You are in danger of passing out at <70%. Sea level is generally 99% - 100% for a healthy person. They generally need oxygen to get to the summit of Everest. I can only imagine the ones who die ran out of supplemental Oxygen before they got down.