Uplinker
fair challenge, but junior engineers report to senior engineers. The guys who fit MCAS modules are technicians, not engineers. If the junior design engineers have reservations they enlist the support of their seniors. And if the case is well argued the senior will (Should) back them. If they don’t a train wreck will follow.
i have never had to threaten to resign to kill a bad idea. A documentation trail to decision makers has always been enough. Most non technical managers are cowards at heart!