The relevant comparison here wouldn't be mask vs. no mask, but wearing a mask as precisely described (e.g. double-masked, N95, no facial hair, etc) vs wearing s

The relevant comparison here wouldn't be mask vs. no mask, but wearing a mask as precisely described (e.g. double-masked, N95, no facial hair, etc) vs wearing some facial covering in a manner which doesn't exactly meet prescriptions. And I'm willing to bet that there's plenty of laxity permitted day-to-day, so long as people are actually wearing a mask.