Stray respiratory droplets exhaled by people infected with SARS-CoV-2 will also kill people.
Presumably you're OK with rules that prevent people from firing guns in public. Why are you not OK with rules that are intended to reduce the risk of people unnecessarily spreading fatal infectious droplets in public?
Your right to shoot firearms ends at my body. Why should your right to spread a fatal disease extend into my lungs?
And, before you say that I should take some 'personal responsibility' to protect myself against infection, should that premise extend to wearing type IV body armor in public just so others can shoot guns in populated areas?