Some very salient points there mate.One issue seems to be that we handicap ourselves somewhat by operating out of Perth and Sydney.
For years there has been talk of establishing a more significant RAN forward operating base at Exmouth in WA and on the Eastern seaboard, options like Bundaberg or Gladstone in QLD have been mentioned. This would give greater strategic capability and flexibility.
However there are reasons for Perth and Sydney. Contrary to common perception the main motivation isn’t being further from harm’s way. Bundaberg or Exmouth are not as far north as say Darwin, Broome or Cairns. It’s more to do with personnel retention. Both uniformed and civilian technical contractors.