If you run around with Covid making others sick, you do not just weigh a risk for yourself, you are also inflicting it onto others. If too many do that, society breaks because hospitals get overwhelmed, firefighters and law enforcement are sick, the grocery store has to close and the government stops working. Children are unattended and whatever else.
If you do not wear a set belt your broken body takes up a hospital bed too, or are you going to accept the weight of your decision and abstain from health care because you inflicted that harm on yourself? Be welcome to not wear a seatbelt then, but make sure to have a big sticker on your car that says: “My head injury was my choice, so do not help.”