Speaking as someone with zero knowledge myself, I'd say that it's because the MACS system is both useful and necessary to safely operate the aircraft. There are lots of systems in any piece of technology that can be dangerous if used improperly. For example: in the Olden Days, you used to have to pump the brakes in an emergency situation to keep them from locking up. ABS became standard 30-40 years ago, so nobody pumps their brakes now because doing so actually makes things worse. But for the first 20 years after ABS, old people would still pump based on experience.