It is impossible to demonstrate this effect in a simulator during training due to the lack of 'g' effects. This pilot may not have even been aware of the phenomenon judging by the previous comments about how the training and qualifications are achieved.
But easily taught under the hood in a light aircraft.
Which is where, IMHO, all pilots should learn about recovery from unusual attitudes.
A few hours per year in an aerobatic trainer should be part of maintaining currency and is not expensive.