Training and implications
With regard to the many posts referencing the practice of various maneuvers and events during simulator training sessions:
Have a look at and thought about what is in those simulators.
Specifically, there was a fundamental shift over the last several years about where the software for the simulators comes from, and most specifically for the 787, 737 MAX and most recently the 777-X. One of the biggest differences between the current approach and the "classical" methods concerns the content of available malfunctions and fault scenarios to be trained. There was a very deliberate choice made to limit that content to only those events that are part of the QRH.
Since MCAS was never "advertised" to the flight crews, it almost certainly was not included in the list of "training events" for the MAX simulators. I *might* be wrong, but not based on the content I saw at several of the "working group" events up through about 2 years back.
Bear in mind that there is a huge difference between an engineering simulation and a crew training simulation. The latter type, especially for the MAX and other recent products, contains only what the provider decided that it should contain.
Take a guess as to who that provider is.