[newen]

There have been doctors in the US in TV, articles, etc that have been recommending people not to wear masks. Doctors who work/worked for CDC, not just random doctors. Some say it's because masks don't work. Some say don't because Americans don't know how to wear masks properly. There have even been doctors saying masks will make spreading/getting infection easier.

People are probably just following their advice and once the advice switches, they will probably follow that advice too.