Instead of KAL, insert...
Just about any South American airline or China Air or... In any organization, there are exceptional, good, average and lousy pilots. There are some cultures that simply don't develop the personal and mental skills it requires to fly airplanes. Naturally, there are those who inherently possess the skills it takes to do this job.
It seems that the industrialized nations produce a higher number of people who excel at flying airplanes. This would make a good thesis for someone getting their Ph.d.
In summary, I wouldn't put my enemy's dog on a third world airline.TC