Nothing else has the energy potential to disassemble the aircraft.
Well kinda maybe perhaps.....if one includes vertical pins and TT Bars and perhaps the Hub as being part of the "rotor blades".
Those failures could release one of the blades and create the kind of Imbalance that would result in a catastrophic failure of the aircraft but not be a "blade" failure.
I would call it a blade retention failure. It would matter not which brand of blade was installed in that case.
If the Tail Boom failed structurally and found its way up into the rotor system and thus create a "blade failure" would that be different than a failure in one of the Rotor Blades occurring without any outside cause akin to that?
I am trying to sort out how you are defining "Blade Failure".
To assess blame we ought to be very specific as to how we allocate "blame".
Care to expound upon your post to clarify your observation which in general I fully agree with but I am still waiting for information that points me to the root cause and originator of the process that caused the aircraft to come apart as it did in apparent level cruise flight in benign weather.