ARFOR
Note the blatant dishonesty in the ATSB Report you have given us a link to.
If you look at Appendix A, you will notice in relation to radio transmissions it says, “only radio transmissions pertinent to the occurrence are included”.
This entirely depends on the subjective judgement of what is “pertinent to the occurrence”.
I, and many other people, believe that additional calls which have been deleted from this log do have an effect on loading the Air Traffic Controller. That’s the reason non-radar tower airspace has small dimensions in countries such as the UK, France, New Zealand, America and Canada – so the Controller does not have a barrage of transmissions that are not relevant in the particular case.