Beagle’s view at #527 is a dated and unhelpful view of safety. Even during training and within limits, it might be possible to weed out the less capable pilots, but the process should be based on a deeper understanding of an individual’s capabilities and reasons for poor performance, and not just on a the outcome of a single event.
Nobody said they would be weeded out with just one event. If that were the case they could bypass the sim and go direct to a real test5 aicraft.
Screwing up the sim is a learning process, that's why instructors carry pointer sticks.
It's the lack of learning and/or lesson retention that is the issue