Your comment conflates two meanings of the word "minority". The first meaning relates to a group with a shared inherent property, such as race, and is irrelevant here. The second meaning, which I used, simply means a small number of people.

It's not an invisible virus. With the right tools we can see and track it. Up until the recent delta outbreak, COVID was being accurately tracked and contained in Australia, with the source of almost all transmissions known. Under these conditions, quarantine is pragmatic, not abstract.