Desert Dingo,
You are doing nothing but quoting from Mahons book, in which he tries to justify his many opinions.
Try reading the reports compiled by very experienced aviation and administration personnel in the wake of the findings of the Commission being made public.
You could start with the Bolt/Kennedy report that was compiled by to look into the allegations of failure by the CAA made by Mahon.
Or the "Analysis of the Royal Commission report", compiled by C.H.N. L'Estrange. It is entitled "The Erebus enquiry: A tragic miscarriage of Justice".
Or the article by Captain Derek Ellis in the British Airline Pilots Association magazine the log of Aug 1985 in which he states "The effect of reading Gordon Vettes book, which is dedicated to supporting the views of the commissioner, has in fact been to convince me that the findings of the New Zealand Office of Air Accident Investigation are infinitely more realistic".