Like it or not, even vaccinated people have a good reason to want covid cases lower.
I know “vaccinated = zero risk” is a convenient approximation. It’s close to true. But, as you would say, that’s micro. It really only explains the short to medium term effect on individuals.
On a macro, population wide scale, it’s different. Having 60% vaccinated while 40% keep the virus alive is just a recipe for creating vaccine resistant variants. Eventually, we have to get our act together and vaccinate the remainder of adults.