If that's what you got from my post then I've failed in conveying my intent. If anything I think that the median Australian driver is among the best in the world. Perhaps even better than the UK, depending on the metric. The only problem is that we're rarely asked to think for ourselves—everything has already been thought about for us.
Really the vast majority of drivers in every country I've visited have been similarly competent. The local variances mainly change the manifestation of badness in the remainder.
You can see many times per day how they overpass other cars (sometimes even in 2-3 rows simultaneously: one car starts overpassing, then another starts overpassing first, then third..) just before a blind corner. You can witness several times per day how in the middle of the highway where average speed is about 100 km/h somebody may just make a U-turn without using indicators and passing the double solid line.
You can ride 100 kmph on a highway and then suddenly there's a truck or a bus or a motorcycle on your lane coming into you because the driver decided that waiting 2km for the next place where he can make a u-turn is too long.
If you drive even for one day in India you'll witness all these cases and more.
Statistics of deaths on the roads incidentally confirms this.
Also, by your logic, French and Italian drivers should be really competent, but they're not. If anything, southern European drivers are less sensible than those in the northern countries, that tend to have more sensible, well-maintained roads. However, statistics make it seem that that is not the case. [0]
0: http://www.europarl.europa.eu/news/en/headlines/society/2019...