I mean it's not like they're putting out a lot in other regions either.
I have a complete set of their traditionally-animated movies on Blu-ray and 4K, so thankfully I don't need anything else from Disney. I'd probably just cancel Disney+ altogether like I did with Netflix and Max, but I get it for free with my phone plan.
The good news is, unlike DVDs and Blu-rays, 4K Ultra HD discs are completely region-free, so you can buy a US disc and it should still play on an Australian 4K player.
Of course, if you don't want to pay, you can always torrent a REMUX or BDMV, which will have the exact same quality as the disc.