Skipping skaters who are likely too dangerous for certain other skaters, is not restricted to Koreans. Why do you think Kerry, last at his GP, got China, and also Orzel, again no big international medals IIRC... really just a coincidence, or could that have anything to do with the fact that China needs Yan to place as high as possible, and skaters like Litvintsev and Yamamoto could be too dangerous for him? As much as I enjoy seeing variety, GP is supposed to be a series that only allows the best of the best to participate. I agree with the poster who said that 10 is too much of a choice.
To be fair, Kerry was also higher on the replacement list than Sota, and Conrad was only one spot below with ~1 difference in their 2018-19 SB, which is what the subs list is based on. Litvintsev was injured, and WD from a couple CS events. He had announced that Rostelecom would be his first start of the season, though I believe he's on the list for the Volvo Cup this weekend.
So the men's choices have been fairly reasonable. I do also think that Yelim may have been offered a spot at CoC, since they gave spots to two Korean skaters, and Young is a much bigger threat than Yelim, but couldn't take it for whatever reason. She's certainly been skipped for other spots. I wish NHK had given her one.