I can only stand for myself. I didn't say never changing government. To me these two are neither obviously better. For opposition, verbal commitment doesn't produce anything. As an opposition, they can say whatever to grab public's attention without bearing any responsibility. It happens every time even in America. The opposition in America is always targeting China and committed to be tougher to China. But after they are on board, no resident was doing what they used to say...
My point is, in a rather mature democracy such as Australia, if one party was obviously not serving the country well, they will be kicked off anyway. I personally don't know/understand how opposition can be much better in this regards.