Caveat: In your opinion.
It is by no means impossible to go the rest of your life without eating in a restaurant. Or travelling abroad on holiday. Or using a fossil fuel. Or eating meat. You could conceivably live your entire life indoors these days.
You have created a level of intrusion and inconvenience that you are willing to bare, for what you perceive to be the greater good, and decided that failure of others to reach your standard it is condemnable. In someone else's eyes, for some other reason, you also fail to make their grade. I have observed amongst humans that this bar is invariably set at exactly the level of the person creating it, and not one bit higher.
Who is to say what's right or wrong? Philosophically, I'd lean towards no one. In reality, the Government exist. And they say no more mask mandate.
So we can have our own opinions about the situation. And where they do not align with others who are not breaking the law, respectfully agree to disagree.
But to brand others selfish for not achieving these fabricated standards of altruism is really quite absurd.
And what are we even doing when branding others selfish? Attempting to bring another human down in order to bolster our own opinions of ourselves. Prove we are correct? Look, its all part of dealing with the human condition. Do what you've gotta do. But perhaps we should all be a bit more self-aware!
Caveat: In my opinion