If you are healthy, getting vaccinated against covid is not something you do for you, it's something you do for others. That's how vaccine works, when enough people are vaccinated, the epidemic stops. Some viruses evolves and for those a vaccine is required regularly (like flu, maybe covid). I can totally understand that you are not worried for yourself (I feel the same) but don't be surprised that people are unhappy that you don't care about them.

And you say you don't go out when you get sick, but I'm not sure how you would do that for covid, since covid can in many cases be asymptomatic.

I'm not sure how it works in your country, but here people that already had covid only get one vaccine shot, as the covid infection is counted as the first one.