You have to make the decision to get a vaccine when you are healthy. You take a risk, even if minuscule, while you could also hope not to get sick. I'm old enough to remember when EVERY kid got measles because there was no vaccine yet, so I know what an endemic virus is. People do not believe that they WILL catch covid.
The monoclonal antibodies are a treatment when you are already sick. You do not have the option to gamble that you will stay healthy anymore.