Because (at least in the US) the “optics” of a “KN95 as the only safe choice” message would be that the past encouragement of the cloth varieties as reasonably

Because (at least in the US) the “optics” of a “KN95 as the only safe choice” message would be that the past encouragement of the cloth varieties as reasonably effective was wrong. It would further decrease the credibility of the government/CDC/Fauci because it would be perhaps the (fourth or fifth?) shifting mask advisory that we have seen in the last 18 months.