5 states have fewer than 10% of their ICU beds remaining. The public death rate of victims who receive treatment when necessary has virtually no relation with the reality of "number of people requiring medical care > medical care available". If those 5 states weren't doing even the minimum of vaccines/distancing/masking that they're doing today, they would be at 0% capacity, without question.
Definitely what Australia is doing is too much, but opening everything and leaving it to individual choices is an incomprehensibly bad position.