Captain Nomad. No other country has area frequencies and ATC sector boundaries marked on charts.
How do think they operate VFR aircraft in Class E and G airspace safely in these countries?
Or is your mind closed? I bet you don't fly a Nomad You most likely fly an aircraft from the USA , Canada or Europe. Would you dare fly a GA aircraft in one of these places? Of course you would as the resultant level of safety is as good as or higher than in Australia.
Rather than have a closed mind why extend your boundaries by learning how more modern aviation countries operate