If australia makes this attempt and is found wanting, what is going to stop China and Russia from doing the same if not worse. Keep in mind that it will take years to build these subs, by the time australia gains these weapons, the war would long be over. Understand that Australia’s military without the aid of the USA would accomplish about as much as the HK has done recently, absolutely jack shit. Australia can try but mark my words, australia will not come out in one piece. Because australia has never been struck once, the impact will be far great once such a strike has hit, australia is still harboring illusions of grandeur, like Taiwan and Japan, all of which at the right time, is going to be shattered for good soon enough