Earlier quoted context omitted.
(I am not a lawyer.) The USA recognized same sex marriage in 2015, but we did so via a Supreme Court ruling. The Court's composition has changed since then, and the new Court has signaled a willingness to overturn settled precedents. While our current detent may persist, I would imagine that an action taken by the Australian Parliament would tend to be more durable.
> I would imagine that an action taken by the Australian Parliament would tend to be more durable. I'm curious to understand why you'd think a law passed by elected lawmakers is more durable than a verdict by judges who have their position for life? Obacare was surely very controversial, but despite the best efforts by the conservative and an ideologically hostile Supreme Court, it remains in place after ten years.
Those efforts were actually pretty half-hearted. They talked a big game, but they don't actually want to abolish it. (Reminds me of how the UK doesn't really want to face up to a no-deal Brexit, despite lots of brave talk. Or how no government in the UK has so far re-nationalised the railroads, despite re-nationalisation perennially polling high with the general public.)