We would be more "selective"? How would we select?
We use "skilled migration" as a proxy for what we really want, which is people with good genes. If you have skills and good genes then you'll enrich the country not only in this generation but in all future generations to come.
So an ideal immigration policy would involve some combination of testing for intelligence, physical fitness and (dare I say it) good looks.
If you think "good genes" is correlated with race, then I'd suggest that you are the one who is racist.
Besides, "talent" can mean many things. Is the Mexican mother who can't speak English and doesn't have a college degree (maybe not even high school), but can make BAD ASS food and is capable of raising a family of 5 talented?
Unfortunately, the US doesn't ensure anything at all for its own citizens, other than their God-given right to accumulate capital in unlimited amounts.