> without much of the above
Have you even visited Australia, and even slightly outside its cities? And then have you visited New Zealand? To have done so and still believe they are equally fertile would require some incredible cognitive dissonance.
> Australian lands are so fertile that it half Asia with wheat and meat
Modern agriculture is very different to ancient agriculture. We didn't have combine harvesters, high-yield evolved (or GMO) crops, fuel-driven pumps, bores that can collect deep group water, tractors to build irrigation and dams etc. Not sure how you could overlook any of this.
> staple of Aboriginal stories
Citations needed. Won't pretend I'm an expert on this, but I'll wager you aren't either. The risk of famine increases with population, especially a population that isn't self-sufficient. It's a post-agricultural phenomenon, which is not to say a tribe couldn't starve, but it's much harder. There's much evidence to say that cooperation, trade, and intermarriage with neighboring was a significant part of indigenous societies, likely borne out of necessity.
> A single very dry season in a particular part of Australia meant its inhabitants would have to feed on someone else's land or die trying.
Dry seasons were less of a problem than you might think, as indigenous people knew where all the water holes were, and could read the landscape^ to know where to dig to get to water. Not enough for expansive agriculture, but certainly enough to survive in one of the harshest environments in the world.
^ A common painting for central Australian tribes is the 'seed story' where they observe that ants have collected seeds to a location which reveal the location of a 'soakage'. Digging in this area, water can be found.
> way more susceptible to obesity and type 2
Any scientific consensus on this actually being a thing?
I ask rhetorically. There's no point arguing against motivated reasoning. I'm done here. Feel free to have the last word.