Most Aussie rap isn't about stuff like that, which is why many move to it from / prefer it to the American stuff, cause it's not just the same old "life was shit as a dealer and a killer, but look at me now, I got a contract and a Maybach, later haters".
That being said, even when the lyrics are "woe is me", you don't have to be black and growing up in Detroit/Brooklyn/Crenshaw to have a hard upbringing. Plenty of abusive families, violence and homeless people in Australia!