Not sure why South Koreans don't try to get out, since education is super strong they could probably move to USA or some other country with more money, easier working culture, and relatively lower housing costs
I can't speak to attitudes, but when I was in grad school years ago, Koreans were very well represented in my program. There were fewer Korean students than Chinese but more than Indian. Generally they do well in both coursework and research so there's likely at least some opportunity to stay in the states, assuming they don't have obligations back home.
With respect, this is luxury thinking. "Just leave" is not a strong argument for anyone except detached/atomized Westerners who have no culture/family/tribe to be a part of anyway.
Most of the people who did this recently (at least in SV) aren't westerners, they're people from different parts of Asia who want better economic opportunities. Doesn't have anything to do with western "alienation" or whatever you're on about
