Vaccines provide a high, but imperfect, degree of immunity, so vaccinated people are still at risk of getting sick from unvaccinated people. In a vaccine-only environment, you both are surrounded by people who are much less likely to get infected, and less likely to transmit if they do.
Vaccinated people are also at risk from other vaccinated people. If vaccinated people are careless and engage in many high risk activities in the enclosed environment, the advantages of vaccination will be reduced.
I don’t understand why vaccinated people should prefer not being close to unvaccinated people.
Vaccines provide a high, but imperfect, degree of immunity, so vaccinated people are still at risk of getting sick from unvaccinated people. In a vaccine-only environment, you both are surrounded by people who are much less likely to get infected, and less likely to transmit if they do.
Vaccinated people are also at risk from other vaccinated people. If vaccinated people are careless and engage in many high risk activities in the enclosed environment, the advantages of vaccination will be reduced.