Rioting , mayhem, arson, and tearing down statues is okay, but singing in church is verboten.
How the hell does any of this make sense?
Dsd,
I think from these articles/WHO-sponsored research.
https://qz.com/1831100/where-does-the-six-feet-social-distancing-guideline-come-from/
https://www.cdc.gov/mmwr/volumes/69/wr/mm6914e1.htm
While singing you generate lots of the very small (<2.5um) particles called aerosols. Those are large enough to infect and cannot be stopped/filtered by any known mask — even the one you are wearing.
This is why I’ve repeated Rancourt’s article about how such particles bypass all masks.