According to the article the group of 5 other hikers resumed their hike after satellite communication was established.
I'm under the impression that if one hiker is injured/sick to the point of emergency evacuation, the trip is over and the remainder of the group goes into support mode until help arrives.
I've only had one close call in a group (potential hypothermia), and the thought of leaving one or two behind never crossed my mind. In as a team, out as a team.
Thoughts?