these countries have a history of mask wearing. They have been worn out of the house, perhaps not to the extent they are now but definitely much more common Just as I have pointed out. Not sure why you are arguing with it, there’s plenty of online evidence for it, plus I live there for a while so have first hand experience. Our country (U.K.) has not. I’m not saying we should go on for ever wearing them but many people on this thread disputing that they ‘don’t do anything’ is not entirely true. Over 50 countries have adopted wearing them for a specific reason.
I have also lived in East Asia. What I take issue with is people using HK/ Korea/ Singapore as a reason we should keep wearing masks despite being fully vaccinated, when these countries don't wear masks when they are healthy and not displaying symptoms of any illness. It's just not true.
I've seen it many times here 'EA has been wearing masks for years and people don't claim to be uncomfortable in them/ say it limits communication/ wear sunflower lanyards so why can't we?'