[rahimnathwani]

"Also, it's possible to make college/university admissions very much anti-discriminatory simply by making them exam-based, and preventing those who check the exams from knowging who did the exam. This is how the system should work."

This is assumes you want to treat each individual as an individual. But, to progressives, an individual is just an anonymous 'representative' of an ethnic group.

If you had a system as you described, progressives would calculate the acceptance rate for each ethnic group. If the rate for each group were not equal, they'd consider that prima facie evidence that exam-based admissions are structurally racist.