I think the key pieces of information are "40 people" and "two hours from camp". Maybe another key piece of information is that most of the climbers in question are accompanied by several sherpas.
I hope if I'm kicking around in the boonies, and I find someone dying there, that I'll find it in myself to stop what I'm doing and either evacuate him, or stay with him and nurse him until he's gone.
In the boonies yes, but on Everest? Are you trained in mountain rescue?
I'd bet that few if any of the 40 that passed him were either.
He's high on the side of a mountain, not on the side of a road. It would be extremely difficult to evacuate him. Extremely dangerous to the rescuers especially if they weren't trained and didn't have the right equipment. Not to mention the physical problems they already have themselves at that altitude.
It's a truly unfortunate event.
There are several "camps" on the way to the summit. They were not close to Base Camp. They were 2 hours from the last tent before the summit. That tent is still in the death zone, where people start dying minute by minute until they get out.