Cases are still rising in NSW despite lockdown. Lockdown in most countries is a very middle-class thing - WFH if you've got an office job, but if you work in a food factory or supermarket it isn't an option.
What is clear is that even if you vaccinate everyone you'll still get a huge wave of infections. Vaccines reduce the death rate by ~95%, but the psychology will have to change.
A lot of Australians think that they'll vaccinate up to a certain %, then achieve Herd Immunity and open up. Pre-Delta that was maybe possible. Now it isn't.
Two case studies in what happens in highly vaccinated populations with Delta:
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Gibraltar - 116% double jabbed (x-border workers included too), eligible if over 16. Currently they have higher cases/pop than the UK
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HMS Queen Elizabeth (Navy ship) - 100% double jabbed. When recently tested 100/1600 crew tested positive. All minor cases thanks to the vaccination.