We simply do not know if the impact would have been survivable in the absence of fire.
Disturbing first responder account that suggests all occupants probably survived a collision with trees, followed by a bounce with rotors turning and then rollover from a height of a few feet.
Bulli Tops tragedy: men traumatised by helicopter rescue attempt | Illawarra Mercury
A man (according to another eyewitness) wearing a helmet tried to exit from (presumably) the passenger side front door, but said he was stuck.
Conflicting reports that they put the fire out, but it was too hot to extract anyone. The Volunteer fire brigade probably took 10-12 minutes to arrive from time of incident and the craft was not totally consumed as one would expect.
Mickjoebill