Because it's science (formerly two masks requirement)

[volchara]

"Masks are really for infected people to prevent them from spreading infection to people who are not infected rather than protecting uninfected people from acquiring infection. The typical mask you buy in the drug store is not really effective in keeping out virus, which is small enough to pass through material. It might, however, provide some slight benefit in keep out gross droplets if someone coughs or sneezes on you."

Fauci answering to former Obama health and human services (HHS) secretary Sylvia Burwell

Well... because it's science!



https://www.newsweek.com/fauci-said-masks-not-really-effective-keeping-out-virus-email-reveals-1596703

UPD. OMFG!
"Expect the Unexpected" Indeed - Fauci's Pandemic-Profiteering Book Was Just Pulled From Amazon