This whole debate begs the question of the lack of leadership by CASA in safety critical regulation. CAR 166 is a wishy washy rule designed to allow CASA to prosecute and insure a pilot has no defence - that is the purpose of the “reasonably’ BS. Either make certain calls mandatory and leave the rest as voluntary (with no possibility of penalties) or make all calls voluntary - again no penalties.
The current system requires verbal diarrhoea as well as responses to prove you were listening as required by law.