That's interesting. I think it's similar in Korea. Because there is so much food available on the bottom in clear lakes, carp rising to dry flies actually seems to be more common in rivers near urban areas than in pristine waters.
To be honest, many years ago I uploaded some carp fly-fishing videos to YouTube, and they became fairly popular. The videos focused exclusively on carp dry fly fishing, from filming to editing. At the time, there were very few carp fly-fishing videos that featured dry flies at all.
Even now, there still aren't many videos of carp being caught on dry flies, which has always left me wondering: why don't anglers in other countries fish for carp with dry flies more often? Nymph fishing is great, of course, but carp on dry flies is incredibly fun as well.
That's actually what brought me to this forum. I was curious why so few people seem to pursue it.
By the way, I rely on online translation for English, so please excuse any awkward wording or expressions.