Even if ground crews reliably checked and fixed AOAs, we probably would never have heard of it. But ultimately MCAS was a symptom of a failure of process, with

Even if ground crews reliably checked and fixed AOAs, we probably would never have heard of it. But ultimately MCAS was a symptom of a failure of process, with people whose entire job was to check and veto designs failing to veto designs, apparently for fear of management pressure. To be clear, the failure was in management. It sucks that people had to die to get us to notice ordinary management failure.