People's analysis of risk changes when there is money involved and yet cost has nothing to do with actual risk.Acceptance of risk is a strange beast. People might have gone back to Bali, but on their way to Bali they will absolutely refuse to fly Garuda because it's 'unsafe'. But they'll fly there on Air Asia or Malaysia Airlines
I am always stunned by people not wanting to pay to book assigned seats and then worry about what will happen to their children if seated separately. Or people who want full flexibility but won't pay the higher fees for a fully flexible cancellation policy. Maybe if Australia charged $10 for the Pfizer and $5 for the AZ things would be different. That is said tongue in cheek - I'm grateful it is all free of cost (other than taxes).