One could argue either way about the cause of the accident,but it is different to the cause of death !
Whilst the failure of the chute to open was the cause of death,this would not have happened if the seat had not fired in the first place - so it would be fair to say that the seat firing was the cause !
There still seems to be resistance to accepting the circumstances causing the seat to fire...
I cannot comment on the wider accusations about VSO's etc but I can say that the technical investigation of this tragic accident was very in depth and of an extremely high standard...it was always going to be a difficult one !!