Dick did not say that it was all the RAAF fault, the program acknowledged the actions of the PIC, but THE WHOLE POINT was that a clearance coastal would have almost certainly broken the building chain of events.
It only takes one action to prevent the holes in the Swiss cheese lining up, and the potential accident does not happen. A prompt clearance to track coastal through Willy would almost certainly have been that action.
As would have not taking off with U/S gyro instruments, not turning into likely icing conditions over high rugged terrain, but turning back or diverting with an emergency declared if required ... not the WHOLE POINT at all.
Emotional arguments aside, the PIC did them in in the end, really, not the RAAF controllers.
Good luck to you, Dick, if you can get freer traffic flow through Willy airspace, but as I said earlier on, the cynical spin is too much.