Australia has imposed a lockdown on part of Sydney, and a neighboring town.

This is necessary.

An article argues that Australia was foolish to depend on its quarantine and occasional lockdowns to protect the country from Covid-19.

I disagree.

In an ideal world, Australia (and every other country) would have vaccinated everyone by now (aside from medically necessary exceptions). However, given the artificial limitations on vaccine production, on top of the inevitable difficulties of ramping up production, Australia was not the most urgent place to use the limited supplies. It was succeeding, as well as any country, in keeping its population safe.