Are false alarms are OK? Wasn't it the startle effect from the false alarm that caused the ET302 crew to ignore that full thrust remained as the plane exceeded the velocity envelope? Wasn't it the false alarm that forced the autopilot to go offline and allow MCAS to operate?
I prefer to focus on the origin of the problem and not the edge of the last chance to correct it.
Why wasn't the autopilot software designed to choose the correct AoA sensor? Why when it went off line didn't the autothrottle also go off line? These are also decades old decisions. Why is the AoA sensor not fail-safe? But, sure, multiple decades of depending on all these bad ideas.