I am from South Korea, and I know this fan death thing could seem superstitious, but as another comment pointed out, it is a cautious approach toward unknowns,

I am from South Korea, and I know this fan death thing could seem superstitious, but as another comment pointed out, it is a cautious approach toward unknowns, in addition to mass version of confirmation bias. (News reports a death with a fan on -- oh, that scary scythe of the fan..) But who knows? There could have been a death that could have been prevented by turning off a fan, and nobody can verify its nonexistence. My attitude toward this is like my agnostic attitude toward God: I just can't know its existence or nonexistence. And I think what the people in the article are expressing can be understood in a similar line (though 100% is an overstatement.) Still I sometimes argue with Koreans with relatively less background in scientific thinking about scientific things like if fan deaths are possible, or using metal spoons for yogurts kill more microbes than plastic spoons, etc, but many times, my conclusion is that I just can't have any conviction about either ways.