Re: shuls that “did not enforce rules”
I am thinking there is a difference:
at one extreme: rules are very conservative (masks outside), most people follow them, and easy to avoid rule-breakers (big shul, ventilation or open windows, part marked for masks, etc).
at another extreme: rules are written up for the health department, most people do not follow them and no consideration given to elderly, etc (small hall, closed windows)