And of course how else can you test the scenario at headquarters on Boeing Sims without pilots who have studied the crash in minute detail and are fully expecting it?
All pilots world wide are pretty aware by now. It’s like tying to find a clean jury. Actually you can.
You. Introduce the failure on a regular sim session with a crew who think they are doing something completely different and are not training captains. We do it all the time on sim checks. Then you see how they cope.