The basic principle of "quarantine" has been long understood.
Should not be a problem to grasp the concept.
The approach to the WA border, like it or not, is in the national interest.
Elsewhere, iron ore and gold production has been cut off at the knees, due to workforce disruption.
"The suggestion that commodity exports will again exceed $250 billion in the year ahead highlights the economic opportunity presented by the absence of the coronavirus in Western Australia, which is responsible for the vast majority of Australia's gold and iron ore production."
https://www.afr.com/policy/economy/b...0200925-p55z9v
Evidence would suggest Australia has handled this rather well, on both infection and economic fronts.
That we should be called upon again to do what actually works, should not come as any surprise.