It's becoming a irrelevent argument with China Southern, Cathay, Emirates, Singapore, Air NZ all operating to all/most capital cities.
Even if you had a super hub in Alice all these airlines would bypass it anyway. Hubs only work if you have domestic feed. Essentially a hub at Alice would only work for QF or Virgin. Even then who wants to fly half way around the world then change planes when Emirates or Singapore will take you there directly.
Additionally to all that if Sydney built a proper 24 hour airport most of the dramas will go away