Anyone can climb Everest.
Doesn’t the photos prove otherwise?
In my experience, (2 Himalayan expeditions in the 90’s, one of which was to Everest) your sense of acceptable risk changes as soon as you get off the plane in Kathmandu, and then significantly changes again as you climb above base camp.
A friend, Mike Rheinberger, died on an Everest. An experienced mountaineer, he’d been on Everest many times, but failed to summit. The last time, he took until dusk to reach the top. He would have known that this far too late to descend safely and had to bivi about 30M below the Summit. He died sometime during the following day, having not been able to descend much further.
He would have known the risks involved, and probably realised during the afternoon on the way to the summit that he was unlikely to return safely. I’m sure he knew that rescue was unlikely, and that he would not want anyone to risk their own safety to remove his body.
Removing the bodies from most of the mountain is virtually impossible, and, in my view, not worth the huge risk in trying to do so.
Walking past another climber who is clearly struggling is unforgivable, but I can see how a combination of someone who is focused on the climb, lack of oxygen and severe tiredness can lead them to make the bizarre decisions of not helping another human being in need.