Perhaps US aircrews are the best trained in the world. Does that mean that Boeing should be building airplanes that are safe only in their hands? You can bet that Boeing has a very good idea of the level of training of their customers around the world - if they didn’t, why would they have created the MCAS in the first place? To make the MAX feel just like a “normal” 737? Who needs that if every pilot and crew flying it are the best trained in the world? The failure of the MCAS is firmly on Boeing’s shoulders, but with an assist from the FAA for letting them self-regulate as much as they did.