But, is it really necessary that all, or most, those exceptional programmers are concentrated in one country? Becasue in the end that's what is being advocated

But, is it really necessary that all, or most, those exceptional programmers are concentrated in one country? Becasue in the end that's what is being advocated here: keep the US a technological 'super'power. Why is that needed (honest question)? How about diversity?