Most people will do what's best. Some won't and will do what they feel like. The issue we face as a society is how address that problem without unduly burdening or penalizing the majority who act responsibly. Right now, vaccinated people have to mask up because there's no way to tell the vaccinated from the unvaccinated. That's okay for awhile, but if it's still an issue in a month or so, we'll have to come up with another solution out of fairness for the majority who act responsibly and follow the rules.