Two things, if you don't think you can reason with them you aren't going to to try very hard so why bother, which is precisely their objection - but the second is, sure, given everyone who wishes and needs to be vaccinated can get it, what is the effect of an asymtpomatic carrier?
I'm saying it does not justify a relationship where people show vaccine passport ID everywhere they go. Greed is a pretty coarse rationale, I'd suggest it's on the critic to be more persuasive. Conflating the arguments against passports with arguments against vaccination is too disingenuous to accuse someone of, but if someone did't see the difference, it sort of ceases to be an intellectual discussion at that point. So what is the effect?