It all goes back to the root cause: an impossible goal was thought to be so important to the company that reality had to bend to accommodate it. The impossible

It all goes back to the root cause: an impossible goal was thought to be so important to the company that reality had to bend to accommodate it. The impossible requirement was that the plane had to behave in such a way that pilots wouldn't need to know the correction system existed. If you work under that pressure for long enough, and enough of the engineers who realize it was BS move on, retire, etc, then as you approach the deadline, you rationalize and justify more and more. You've already embraced the idea that commercial pilots won't need to know about the existence this system that corrects the attitude of the plane, you've already rationalized leaving it out of the documentation and training and pretending it's not part of the control system. So why would test pilots need to know the parameters either? At the point they were at, this was a tiny leap to make.