I'm just going to bring some honesty here there's no way a scholarship basketball player could succeed in Computer Science at UIUC (spoken as a current engineering student).
No offense, but this is so far off base it makes me wonder where you get your bias. I'm sure Okoro can do well here if it's what he wants.
Test scores are cheap and easy for colleges to use, but they have been shown to be less predictive than previously thought. Only about half of colleges even bother to check whether test scores are predictive of success at their institution.
High school achievement is actually a better indicator, and various studies have shown a wide variety of noticeable correlations (income, GPA, test scores, attendance). It'd be one thing to question a kid who's demonstrated they're ill-prepared, but to question a young man who values education and has a very respectable test score...I don't get that.