"Government treating its citizens like adults" and "Australia" really do seem to be mutually exclusive at this point.

This a certainly an option but not a realistic one. Culturally speaking it's impossible to trust anyone (adult or otherwise) to comply with something like this.

> be treated like an adult and just stay home for 2 weeks

Ah yes, that thing adults routinely do.

People have been getting sick literally since the dawn of man. I knew many co-workers who'd come in with a cold or a fever and get the rest of the office sick. Now, there's a virus that's so dangerous you need a test to know if you're even sick with it but people are demanding everyone stays home so nobody catches it. If you don't want to catch it, stay home, but don't ask myself or others to change their behavior