You could and lots of people have. The visibility of masks (literally in your face!) tends to distract people from this, but the vast, vast majority of Covid restrictions were revoked after vaccinations became widely available, including anything in the vein of "stay home" or "social distancing". In all of the US and I think a substantial chunk of Europe, it's considered safe as a matter of policy for vaccinated people to go wherever they'd like and do whatever they want.