Yeah, that's a famous example of a failure in the process.
The deal there was the MCAS system was originally designed such that it was thought to be not safety critical. It relied on another sensor that was also non safety critical in its other uses. But then over time Boeing made changes that made it safety critical, and rather than upgrade the hardware they put some footnotes in the manual and expected pilots to do things to avert disaster, but then they didnt properly train pilots to those changes to their duties.
The deal there was the MCAS system was originally designed such that it was thought to be not safety critical. It relied on another sensor that was also non safety critical in its other uses. But then over time Boeing made changes that made it safety critical, and rather than upgrade the hardware they put some footnotes in the manual and expected pilots to do things to avert disaster, but then they didnt properly train pilots to those changes to their duties.
It was a comedy of errors on many levels.
None of it changes my parent comment.