No just any pilot or engineer can just walk in the ATSB's front door and start generating suitable reports, it takes years of experience - even for highly experienced pilots and engineers.
It takes years of experience to apply a wind vector as a tailwind before & after a 180 deg turn? Or produce different wording for the transcripts of radio calls between the initial, preliminary and final reports?
Most ATSB reports lack fundamental understanding of scientific method. They are typically not transparent and fail to provide enough primary data to allow review.
Furthermore, when serious technical investigation is required now, its typically done overseas with the engine or airframe manufacturer. And any report with detailed technical involvement - or controversy now takes over 2 years to produce. You don't need "years of experience"to investigate a C172 taxying a wingtip into a pole, which is the level that makes up the bulk of the released reports.
This is an organisation that cost us $24.8m last year. 64 out of 116 employees are paid over $108,000 pa. For $24.8m we got 162 safety investigations - 60 complex ones which take a median of 458 days and 102 "short"investigations which took a median of 84 days. The average cost is $153,000 each. Have a look at any of the reports published in the last 3 months and consider whether any of them are worth $150k.