i agree that people make these sorts of assumptions all the time.
Both people and policies. For example, the entire H1-B Visa program is based on those assumptions. From what you’ve posted, I assume you consider the H1-B Visa program a racist program.
People aren’t that different at their core. How much formal education says almost nothing about wether you will contribute to a society or how. Education is clearly valuable but it alone doesn’t determine your worth, or your potential, and that is especially true if you never had the chance to get an education. Similar arguments can be made about culture.
That’s all true……..but when you’re talking about a national POLICY, one that might have negative results if you get it wrong, then you’re somewhat limited to quantitative measurements.