Well actually that IS the "point." But I'm not so sure even armies of psych docs would do -- we're better off bringing in genetic engineers. Therein lies the real problem.
You may have a point. Seems to me that the majority of people with any initiative and brains departed the Old World for the New World between 1492 and the first quarter of the Twentieth Century. This was a truly huge "brain drain", leaving the stupid, the terminally lazy, the helpless, the weak, and the evil behind.
The process continues, at a slower pace- we are siphoning off the most productive members of many societies even today.
This is the REAL explanation for American dominance in practically every sphere of life. The Europeans achievements are behind them.