"I seriously doubt the experienced Everest guides would have just left him there if there was any chance to get him down safely."
Sample questions that a guide must ask:
Does he have any chance of living through the descent?
How long will it take to lower him down Hilary Steps 3, 2, and 1?
Will a rescue deplete our oxygen and enrgy before we get him down?
Will I be able to pay attention to my clients on the descent?
Are there enough experienced climbers here to assist in downhauling him?
Will we complete the descent before nightfall? Is the weather holding up?
Etc.
And:
Do we have the equipment we need (extra ropes, etc) to attempt the rescue of an immobile man?
How many in our group have been trained in mountain rescue?
How many people are we putting at risk to save someone who has very little chance to live?