It is not impossible for many. It is just not worth the risk of making more dead bodies while trying to retrieve them. So they do not bother. Callous to some but that’s reality. Hell, some dead bodies are used as milestones or waypoints for some going up.

There a few though that have been lost over the years. And trying to find them is simply too risky. There was the body of a British lady who you could see a few years ago but no one can see her anymore. Likely just covered in snow/ice.