I think it is "slightly" unfair to claim that there are NOT "cultural issues" in play in many "operations".
Europe also has it "fair share" of those.
"IF" there were "cultural issues" at play here, ("junior" trainer new to post, "senior" trainee" and the third guy outranked and "unwilling" to comment) I'm sure the "facts" will be easily established ONCE they are reported....and not before !
Alas, "if" that is the case, then factoring "that" issue out of the cockpit hasn't worked.
And whilst it may end up that "The Koreans" are to blame, the finger thus pointed, many will not look at their own "CRM" and take heed.