Speaking of "proximate vs. ultimate causality", WHY did they make "an unstable plane with a dangerous MCAS"? The answer is to reduce emissions. That must be ac

Speaking of "proximate vs. ultimate causality", WHY did they make "an unstable plane with a dangerous MCAS"? The answer is to reduce emissions. That must be acknowledged if we're also supposed to acknowledge the cost pressures mentioned in the article. Both the reduction of emissions and the effort to avoid retraining are regulatory impositions.