I don't disagree with this statement except in nuance..
Yes, if we could hit 80-85% of adults being vaccinated in the next 2-3 months without vaccine passports, then they would be totally unnecessary.
But that is looking unlikely. We need a bit of a carrot/stick to over the vaccine hump. Telling people, "once you get vaccinated, you no longer have to voluntarily wear your mask!" -- that doesn't really do anything, because those people mostly already stopped voluntary masking.
So as vaccination rates slow down, use of passports should start to increase. We should already be *starting* to implement passports, as it being done in some limited fashion in New York. That said -- while I think we should do it -- we won't do it.
While it should be a plan B.. or even plan A2... instead, it may be more like plan G4.... after another dozen plans fail, maybe we will consider it.
I'm hoping I'm wrong: Hoping we can get 80-85%+ adults vaccinated without resorting to passports OR hoping we can reach herd immunity at a lower proportion. But to be clear -- the target is what is happening now in Israel, eradication of community spread. Not just case reduction. Israel is proving it is possible.