All helicopters prone, Nr Fairy?
I've managed 5000 hours plus on helos without encountering it so far.
The mast bump in the 206 is extreme and rare.
Farnborough has a skip full of robbie tail booms cut off by their own rotor blades.
As for this particular accident, I can only agree with you. But, the last thing a pilot needs when it all goes pear shaped, is a machine whose requirents for safe extrication exceed his experience and abilities.
It went pear shaped, possibly due to the cosy feeling engendered by the instrument awareness course. It became fatal, possibly because the robbie is a bitch in low-houred hands.