Earlier quoted context omitted.
This is not meant to be a rebuttal to your comment, but a discussion. Consider the case of South Korea and Japan. 1. Dense populations. 2. Very little Covid19. 3. Relatively low lock-down related economic impact. 4. Nearly universal mask wear. Honest question: what else do we need to know? I strongly suspect that if the United States, or any other country, had nearly universal mask wearing, we'd have a strong economy…
Masks are the thing you do if you cannot socially distance. We have good evidence for social distancing, we don't yet (for a variety of reasons) have good evidence for mask wearing. You point to South Korea, and then claim it's the masks. But there's a bunch of other stuff they're also doing (because of their experience with coronaviruses): earlier lockdown, harder lockdown, much better test trace and isolate program…
> harder lockdown
So I did some more digging, and found this:
https://thediplomat.com/2020/11/south-korea-faces-another-po...
This broadly supports what you're saying. Their success has been due to many rigorous and (near?) universally adopted protocols, not just mask wearing.