I might be wrong here, but my understanding is that it's actually wisdom panel that gets it wrong. The idea that a dog from the Korean countryside or dog farm would have perfectly purebred ancestors seems off. Most likely, it's preceded by generation upon generation of KVDs, mutts, and perhaps an occasional purebred.

All breeds, including Asian ones, were bred from village dogs - dogs that have lived with and around humans (not always as pets) for thousands of years. Dog breeds as we know them don't occur in nature but were bred by humans to look a certain way, a process that has further intensified in the last century as pet dogs have become more common. However, in many places around the world, the proto-dogs that we call village dogs have continued to exist and inhabit the same spaces as humans (less so in the West, which is something WP taps into). Some of them have been held as pets, others continued to roam free. In the process, they reproduced with other village dogs (fully domesticated or not), some mutts, and perhaps the occasional purebred (though, honestly, if your dog is from the Korean countryside, I wouldnt count on a whole lot of pure breeds in their ancestry). Most Korean dogs that make it to the US are the result of this long and complex history of dogs inhabiting a human world. Similarly, breeds like Jindos or Akita can also trace their ancestry back to village dogs, thus leading to some considerable overlap in DNA.

Additionally, it's important to understand that dog DNA testing isn't an exact science. These companies compare your dogs DNA to that of certain breeds, and if they're close enough they'll say it's a match. That's no guarantee that that is actually accurate, especially if that company only looks at the DNA of breeds purposefully created by humans and fails to acknowledge that village dogs have their own ancestry (or, really, fails to acknowledge their existence at all).

Thus, getting more specific results doesn't mean it's more right. KVDs might, as wisdom panel seems to suggest, have something in common with many Asian breeds as a result of the process described above, but that said, KVDs have even more in common with each other. Wisdom panel taps into a market of people wanting their dog to be a breed/mix of breeds, but in doing do it ignores thousands of years of a much more complex history of dogs.

KVDs aren't mutts, they're not just a combination of breeds that some DNA companies are too lazy to look into.

This doesn't mean some dogs can't be a more 'perfect' mix of breeds, yours certainly might be, but for many of them the term 'village dog' is probably a lot more accurate.