Your argument is already flawed. We don't have vaccines available to everyone in the US yet.
In Oregon we were on a very bad trajectory in the last two weeks with hospitals full and "elective" medical procedures suspended in some areas (my family being directly effected by this), that is now being deflected a bit by the renewed mask mandate. And in America we're very fortunate with how easy access we have to vaccines, other places aren't as lucky so they have to enact harsher measures...
I've complained in other spaces about this, but it really feels like we're reliving the 1918 flu again. People dealt with restrictions the first year, but got fed up the second year. Costing lots of human lives.
My problem is simply the loose definition. Kate Brown didn't even say that much, I don't think. But if that's the metric, it should be easy enough to say so, and define it. E.g. "When ICU bed occupancy is below 90% and has declined for three consecutive weeks, the mandate is lifted."
I think many people would quibble less about the mandates if they weren't open-ended.
Mild? Australians can't travel more than 5km from their homes. For essential purposes only. Vaccinated Australians can only leave their homes for 2 hours a day (unvaxed 1 hour a day).