Like the psychological illusion of total 80+ mph driving safety in a steel cocoon of 14 Air Bags and Anti-lock brakes, could mandatory mask wearing cause illogical additional risk taking?
The very same point can be be made with the "6 foot" suggestion, in that 6' is almost an arbitrary number picked out of the sky, should be, maintain as much distance as you feel comfortable with, if safety is a concern, more always being safer
"When one’s appeal is emotional, it does not matter if there is no substance."