I don't know, people in the US seem to be pretty stubborn. I think people feel that being asked to wear a mask is somehow "un-American"
At this point you might actually find a good number of people, even in the US, who would wear face masks without being forced to, assuming we could actually get our hands on them.
People are probably just following their advice and once the advice switches, they will probably follow that advice too.
Consider watching something like https://www.ted.com/talks/jonathan_haidt_the_moral_roots_of_... , and then ask yourself: Which groups would you expect to accept and even enforce mask wearing, and which will reject it?