It's been known for quite some time that there's basis for thinking that "asymptomatic" transmission is a threat. Just as it's been known for quite some that outdoor transmission, even in crowds, is not a meaningful threat. It remains the case that the vast majority of transmission takes place in congregant settings (e.g., nursing homes), hospitals, and, to a lesser extent, domestic settings (at home, among family members).
Pretty much every single thing that the CDC has "recommended" for responding to the pandemic has been wrong, if not affirmatively counterproductive. Clean miss. The CDC should have been disbanded decades ago.
Correction: “It’s been known for quite some time that there’s NO basis for thinking that ‘asymptomatic’ transmission is a threat.” Typo on my part. Sorry.