"I see little point in endeavouring to train for black swan events, per se, but to use appropriate scenarios to provide generically useful training (for confidence and resilience) appear to be useful, I would have though"
Exactly; A good example of using scenarios are what Airbus and other are attempting with upset recovery training. Which will help recognize and contain startle factor with more advanced simulator outputs which will enhance a given scenario with more realistic sim training.
Safety First-issue 7
"Containing the startle factor applies to every situation a pilot may encounter, regardless of high altitude or sea level operating environment. It is a natural reaction; perhaps even reflex action, to want to do something when one is startled. Reactively, disconnecting an Auto Pilot and making un-calibrated open loop rudder and/or control yoke or sidestick inputs will never be the correct reaction and will almost always lead to an amplified abnormal situation. It is in this area that pilots must develop skills to discipline themselves from putting their hands and/or feet into motion, without first understanding what is going on and what the potential consequences of their actions will be. Disconnecting the Auto Pilot under effort in a reflex action is particularly significant as it generally results in a large control input. Indeed, many high altitude upsets would never have become upsets had pilots contained the startle factor. This is a critical area of human factor development that cannot be overstated."