Could be these angels are random ordinary people chosen or possessed to be promoted temporarily to perform an important function. When I was in my teens I was on a group training course to learn how to operate some heavy machinery. Another student got her hippy style clothes entangled and was being sucked into the machine. I guess I was the only one who actually listened to the safety briefing and I hit the emergency stop system just an instant before she would have been dead or seriously injured.

Since that time I have lived a completely ordinary unremarkable life. Maybe she was important herself, or maybe later went on to have a kid whose kid would battle against skynet or something.