The "Concerned Crew member" could of opted out of the flight if they were so concerned, but running to Media gets more likes on Social media I guess.
Air NZ are doing what the MOH tell them. That's why crew are getting jabbed up the nose multiple times per roster and locking themselves in Hotel rooms... on both ends of a TOD.
But hey, if the local PPRune Virologists think they know better then by all means, ask Ashley Bloomfield if he wants a break and step up.