The good news for Australia is that you are probably eliminating the virus and will be able to reopen everything soon, safely. The key point of the comment you are responding to --- "If hospitals are empty, it's time to stop sheltering in place, because it means it's working too well" does not apply to Australia, because it assumes a "flatten the curve until we reach herd immunity" strategy which is not Australia's strategy.
The real problem in the USA and most other Western countries is that there is no clear strategy to defeat the virus. The actions being taken are mostly consistent with "flatten the curve and wait for herd immunity", but that pretty much guarantees crippling economic damage and mass death.
The real problem in the USA and most other Western countries is that there is no clear strategy to defeat the virus. The actions being taken are mostly consistent with "flatten the curve and wait for herd immunity", but that pretty much guarantees crippling economic damage and mass death.