The problem is the autopilot is a crutch to perhaps 85% of airline pilots in Asia, Europe, India and the Middle East. As is the flight director, too. The FOQA computer transmits all handling back to the engineering base and flight crew heads roll if it detects FD turned off, or AP not engaged. It depends on the operator of course but the knowledge that FOQA is monitoring so many parameters is enough to discourage flight crews from keeping their hand in during line flying.