I'm not familiar with Australian politics deeply, and I think drier conditions can make fires worse (by adding more plant matter to the fuel stores in the bush), but I think there are many factors involved, especially considering Australia has a regularly recurring bushfire season historically.
There have been less controlled burns than desired, but that's mostly because of budget cuts and a much longer fire season due to climate change.
As for my news sources - I don’t think they should be dismissed due to association with Murdoch. One of the articles responds to claims that the Greens aren’t against controlled burns with lots of links to evidence that they were indeed against it, at least for certain time periods or in certain jurisdictions.