The Army approach: A vehicle rolls. Passengers in back are injured - some sent to hospital. Investigation: The driver - staff on a course - fell asleep. Stupid corporal, unavoidable accident.
But why did the driver fall asleep? Because he wasn't given adequate time to rest. Why wasn't he given the time to rest that CAF directives require? Because leadership (Sgt and Lt) of the course didn't think they had to follow the rules.
So it was in fact avoidable, there was in fact misconduct, and it wasn't a Stupid Corporal situation - it was a bad leadership situation.
But the Army would never admit to that, so the official MSE accident report blames it all on the Corporal.