The point is, racist discrimination, even if “positive”, produces unfair outcomes. Obama’s daughter don’t need even more advantages. If you want to help kids from disadvantaged backgrounds (and I think that’s a worthy cause, even if you ignore “fairness”, simply because it increases the odds of finding the next Ramanujan and improves the well-being of the society), you should help people from disadvantaged backgrounds. Admitting them to degrees they don’t deserve isn’t actually helping them - it’s mainly just fixing superficial statistics and perpetuating harmful stereotypes (e.g. people not wanting black doctors because they suspect they’re worse because they weren’t subject to as strict standards as white, let alone Asian, doctors). To ensure actual equality of opportunity, you need to help them when they’re young, improve their school system, help their families, etc. Everything else is just a bandaid, at best masking rhe underlying problem.