My current understanding of any honest mask debate is that is is dependent on whether or not we are to believe Covid is spread via droplets or via aerosol. Masks, even crude versions of masks to some extent, would work to reduce the spread Covid if the primary form of transmission was droplets. For most of Covid's existence the most common and supported belief, publicly and scientifically, was that Covid was primarily spread via droplets. Everyone referencing how only N95 and similar quality masks work are also likely functioning under the understanding that Covid is at least partially, if not primarily, being spread via aerosol. If Covid is being spread via aerosol, which is becoming a more supported stance, then the the belief that non N95 masks don't work is likely the more appropriate stance. This is antidotal, but any instance where Covid is believed to be spread in a closed environment among individuals who are socially distanced, and even masked, is evidence of Covid traveling as and aerosol. Imagine a 2 hour closed door business meeting. In such an instance, anything spread through aerosol has the ability to literally saturate the air in the room given enough time and not enough ventilation.
Here is a link to a pretty followable but long article that has this succinct conclusion:
"Face masks in the general population might be effective, at least in some circumstances, but there is currently little to no evidence supporting this proposition. If the coronavirus is indeed transmitted via indoor aerosols, face masks are unlikely to be protective. Health authorities should therefore not assume or suggest that face masks will reduce the rate or risk of infection."
https://swprs.org/face-masks-evidence/