I don't think I have ever sold a .com.au where someone has just made an approach of their own bat, that is not a good state of affairs where you basically have to chase buyers to move anything. A good name should get regular inquiries of its own accord.
So essentially you are a bad .au domainer who has bad names compared to the rest of us
You like .com because it compensates for your inabilities to pick, buy and sell .au domains
fyi https://en.wikipedia.org/wiki/Self-serving_bias
QED