No wish to creap the thread but, for accuracy, weren't the two co-pilots in the Staines incident RHS checked ? Had to be in my day. Capt would designate who was to fly RHS & who was to fly as Panel Operator. Pure System Panel Operators were straight from Hamble or new on type & got RHS checked later. Capt Key decided on the first leg to put the much less experienced Guy in the RHS but he would have been RHS checked.
Back to thread though. Not just AA guys. Other threads have demonstrated the "wasta" & local preferences endemic throughout the ME. It will never change.