A thought occurring to me is that oncoming traffic, towards that overtaking idiot, is expecting normal behaviour, and so likelihood of spotting that idiot, in time, is reduced. Maybe an oncoming FSD car would detect it sooner and avoid / reduce the accident.
I saw one FSD video where car was at a red light, turning right (driving on the right of course). Light turned green, car didn't move, a car jumping the light came though (from the left), and then FSD calmly set off and made the right turn. Human driver may have seen it ... but also might well have been looking right, and not seen the approaching car from left.
So maybe "some new scenarios where you will die" and "some existing ones where you would have, but now you won't"
Not sure that's a good deal though .... 'coz I'm an excellent driver (we are all well above average, right?!) and I would not be troubled by all those avoid-idiot scenarios.