I would argue that both things do not necessarily have anything to do with each other.
I fly in an airline that both actively promotes manual, non FD flight as much as possible and still has the dual AP use in all cases SOP.
If someone wants to fly a raw data approach out of FL390, not a problem, go right ahead. If one however, for whatever reasons, elects to use the auto flight system, use two autopilots for approach, even if you plan to switch them off later on anyway. It gives the option to continue using the automatics until the end of the rollout or go around.