The outlook for ‘exceptionally low rainfall’—that is, drought in its usual meaning—in the BOM’s own modeling for Southern Australia has a ‘central tendency’ of no change or slightly fewer droughts (see Section 5.2.2 quoted here). The modeled results show increased drought (‘exceptionally low rainfall’) only in the ‘tail’ of the distribution: below the 10th percentile of results.
What that means, exactly, is that increasing drought is completely untypical of any of the model results for Southern Australia because it occurs in fewer than one-tenth of all modeled outcomes. Statistics gives no warrant to characterize the ‘typical’ results of the tail. They’re in the tail of the distribution precisely because they’re a‑typical.