Do you know what sources they used to say that Asian immigrants were hand selected on the basis of education / income? Seems dubious on multiple levels. Educated and financially well off individuals generally don't leave their own country to start over in a foreign land. I would also expect to see a higher number of old asian immigrant professionals in various industries, which I don't.

Most Korean immigrants from that time were certainly not educated or financially well off. In fact most korean immigrants were from the worst part of Korea, Joella. Saying most immigrants from Joella were educated and well off is like saying most people from Compton or Baltimore are educated and well off. So the truth is that the US took in the poorest Koreans, not the richest.