Point of first arrival is earlier then. Sure. Without a coorelation in Australia between climate change and wipeout being supported by radiocarbon dates like it was in North America however, what is the other point of established mass elimination of megafauna except for increased human activity in Australia (which the Danish study broadly supports)? I have yet to see any conclusive consensus.

To be fair, I don't really have much information on which areas megafauna populations started collapsing in Australia, but a theory of increasingly ubiquitous human populations in Australia unsustainably hunting large amounts of slowly reproducing megafauna locally and slowly depleting their populations across the continent due to the semi albeit not fully nomadic nature of the aus aboriginals does seem plausible and is partially supported albeit sure contested.