Sorry, I should clarify. The "that's a shame" comment wasn't directed at you at all. It was actually something I was saying to myself, but I think the translation may have caused a misunderstanding. Please don't take it the wrong way.
Even here in Korea, there are fly anglers who fish for carp exclusively with sunken flies. I know very well that it's a challenging, exciting, and highly rewarding way to fish.
This is a video I uploaded to YouTube a long time ago. Back then, carp fly fishing was viewed quite negatively by many fly anglers in Korea because it wasn't considered the traditional style of fly fishing in clean mountain streams.
Anyway, sorry for the long explanation. I do have other reasons why I feel a bit disappointed about the lack of carp rises, but explaining them would probably take much longer than this post.
If my wording gave the wrong impression, I apologize.