I think the experts got it wrong in implying that everyone wearing masks, in public would not decrease the virus spread.
If everyone (who doesn’t know whether they are infected, i.e., everyone not tested or recovered) wore a mask, we might substantially decrease the spread. The mask would be to protect others from airborne spread from simple talking or breathing in the presence of others.
From the article: “If the coronavirus is airborne, that could help explain why it is so contagious… Large droplets are still a means of infection, but researchers now say that tiny airborne particles may also carry infectious virus. “Currently available research supports the possibility that SARS-CoV-2 could be spread via bioaerosols generated directly by patients’ exhalation,” researchers from the U.S. National Academies of Science, Engineering and Medicine wrote in an April 1 report to the White House Office of Science and Technology Policy.”
Problem: We still don’t have a proper supply of masks. (Thanks T rump administration.) We are still rationing masks for frontline healthcare workers.
People in other countries who are already thru their 1st wave, look aghast at Americans not wearing masks in public, like they all did and still do.