people don't comply...and he's not helping. He cites problems with RCTs of mask wearing due to non-compliance affecting the results, which is why the NEJM Study of School District mandates is so meaningful...i.e. Compliance was assured for all students, teachers and staff during each school day...and the results, with "Difference in Difference" analysis methodology being employed showed definitive benefits from mask wearing vs. those who didn't.
Masking doesn't harm anyone, and it sure doesn't increase the likelihood of getting infected...so there's no good reason for not wearing high quality masks, like N95/KN95 respirators if they're available....or Surgical, and even Cloth Masks when the best aren't available in the midst of a raging pandemic.
N.B....Baron has posted that during the pandemic, He...his Staff...and Patients ALL wore masks during the pandemic.
btw, I've attached another paper explaining the value of Masking during an airborne pathogen pandemic.
Link: https://gh.bmj.com/content/5/5/e002819