I read once that it takes over 10 “fresh” rescue personell to get an imobile person down from the death zone… in good conditions. I wonder what a coherent dedicated rescue team would take? 50 personell on rotation to the south col in groups of ten in case a rescue is required? How many of those would die just to keep a presence.
When you trawl through all the everest literature it is loaded with successful rescues. Almost always the rescued person is still able to move on thier own; the ones that dont end well almost always involve some one who can no longer move, extreme weather (survival mode) or just too few climbers at the scene or nearby to assist… tired, oxygen deprived, dehydrated, horrendous exposure down the mountain side.
Stories like those of David Sharp make the headlines, but not the background. On his own, no sherpa support past base camp, no radio, noone really knowing where or who he was. Not surprising it turned out the way it did.
One of the best Everest books is “into the silence” by wade davis. Takes you on a trip from the first sightings of everest to mallory’s last climb, via the trenches of ww1.