I (probably badly) was pointing out that vast chunks of Australia, to maybe 4 or 5 decimal places of precision, have zero people per square kilometer. We only have 25-ish million people, but fully half of them live in just three cities, Sydney, Melbourne, Brisbane.

The map here strongly proves your point: https://worldpopulationreview.com/countries/australia-popula...

And mine too - look how much of the country is devoid of towns with at least 10,000 people in them... I just slurped that table into a spreadsheet, there are 24,860,107 people represented in a coloured dots in that map. From that site's total population of 25,463,119, that leave 603,012 people spread across that vast unmarked unmarked grey interior...

I live in Adelaide. It's over 700km to the nearest city above 250K people (Geelong).

Perth of course is the most isolated major city (1M+) on earth - over 2600km from the next 1M+ cities (Adelaide and Bali).