Re:
Perhaps the following statement near the front of the report explains this:
"In terms of Regulation 12.03.1 of the Civil Aviation Regulations (1997) this report was compiled in the interest of the promotion of aviation safety and the reduction of the risk of aviation accidents or incidents and not to establish legal liability."
I think you will find that it is normal for investigation branches performing ICAO Annex 13 investigations all over the world.
Norway:
The Accident Investigation Board has compiled this report for the sole purpose of improving flight safety. The object of any investigation is to identify faults or discrepancies which may endanger flight safety, whether or not these are causal factors in the accident, and to make safety recommendations. It is not the Board’s task to apportion blame or liability. Use of this report for any other purpose than for flight safety should be avoided.
UK:
The sole objective of the investigation of an accident or incident under these Regulations
shall be the prevention of accidents and incidents. It shall not be the purpose of such an
investigation to apportion blame or liability
Sweden (Both Civ and MIL)
SHK investigates accidents and incidents with regard to safety. The
sole objective of the investigations is the prevention of similar occurrences in the future. It is not the purpose of this activity to apportion blame or liability.