High mountain rescue brings up two problems;
1-The wind around mountains is unpredictable to say the least.
2- High altitude(thin air) means that weight is absolutely crucial.
The Everest stunt could be carefully planned with the weight decreasing as fuel was consumed. Rescue is entirely unpredictable so the safety factor MUST be far greater. Think of the difference between going into space and back(John Glenn) and bringing back Moon rocks.
