He recommends that for communities, which presumably include significant numbers of unvaccinated folks. Which, if targeted to N95 or better masks, and actually enforced, could have substantial effect!
But having members of the least infectious subpopulation voluntarily mask is pretty much useless.
As to your second point, there is strong evidence that is not the case: https://pubmed.ncbi.nlm.nih.gov/34250518/ Vaccinated individuals who get infected have substantially lower viral loads, and thus are substantially less contagious.
He recommends that for communities, which presumably include significant numbers of unvaccinated folks. Which, if targeted to N95 or better masks, and actually enforced, could have substantial effect!
But having members of the least infectious subpopulation voluntarily mask is pretty much useless.
As to your second point, there is strong evidence that is not the case: https://pubmed.ncbi.nlm.nih.gov/34250518/ Vaccinated individuals who get infected have substantially lower viral loads, and thus are substantially less contagious.