The problem with this argument is the slipperiness of the slope. So we shouldn't try to enforce gun laws either, eh?
You're either going to have to be more specific, or concede that we live in a society where individual actions have consequences that influence others.
We have vaccines, but they dont stop transmission or contagion.
If they did, a vaccine mandate to protect others would make sense. However, since they dont getting/not getting the vaccine mostly impacts the individual it is odd that we have vaccine mandates.
I am not sure this has been proven but assuming it is true would you be comfortable with taking this kind of marginal benefit as justification for mandates along the lines of “get the vaccination or you are fired?” What about in other areas?
Attending a protest is attending a spreading event which impacts others for example.
Don’t use your fear to control others and prevent them from making their own decisions.