Having worked in Korea for 5 years, I can verify that the Korean culture has direct safety impacts on the flight. Whether you like or dislike the culture is a matter of personal opinion, but it definitely does not belong on a flight deck.
Read the chapter in Malcolm Gladwell's book "The Outliers". He is too kind to them. One expat who flew over there said, "There is a difference between Korean culture and Korean Air culture." He described the Korean Air culture as "dysfunctional".