SLF here. While I agree that it's responsible to step aside when you know you should not be flying...
(a) There are two people on the flight deck, and the calm one is qualified to drive the a/c to its destination while Capt Upset cools down.
(b) This is not Egypt Air, where the primary goal is to off oneself and to Hades with the pax.
(c) It was a short flight, not a milk run thru short runways in the mountains.