Not to mention NL is like a blip on the world map as compared to AU on size..:)
People forget. The numbers tell a really great story.
You could have a gigantic nation which is completely centralized into one city, giving you a super low population density on paper.
It's not the case in any of your example, so not really an issue here. Nonetheless...
Only trying to provide context for the economics of density in places like Singapore and the a Netherlands, not necessarily prove the opposite use case. I just wanted to highlight a contrasting factor that is very important for fiber and other high speed service viability. There are many others!
These criticisms are totally valid.