Forget: "Am I missing something? 3 crew 737.
"
Not really, Forget, more to the point the unions that forced it upon their hapless managements did, I would say. It was merely the airborne equivalent of the fireman, or "second man", rostered by BR on diesels where there was no fire to tend, but none the less he had a seat, a windscreen wiper, and an oven to heat the pies in!