None of what you describe is wearing masks constantly. This would be mask-wearing in all social situations, for years, for every one, including children. And n

None of what you describe is wearing masks constantly. This would be mask-wearing in all social situations, for years, for every one, including children. And none of these tell us the population-wide effects of switching to mask-wearing, even for the limited scope that the people in occupations you mention wear masks, would be benign. For example, there is indication that emotional connections between doctors and patients are disrupted by masks: https://pubmed.ncbi.nlm.nih.gov/24364989/ https://pubmed.ncbi.nlm.nih.gov/24364989/