Believe it or not, there are people who really are afraid to get sick, but would go to shul, for example, if other people took it seriously.
If you are of the opinion that masks and distancing are unnecessary, what gives you the right to impose your opinion on other people. You are choosing to ignore public health guidelines at their expense.
This superficially libertarian “live and let live” attitude in this context ignores the fact that your choices impact other people. It’s not like sky diving where you assume the risk. You are forcing other people to choose between assuming your risk, or in the alternative, to avoid behavior they have every right to engage in.