It's the system. If you have a talented white CB in high school the coach will encourage them to play Safety as they believe their chances of getting recruited to college will increase as a Safety versus Cornerback. If they remain a Cornerback and happen to get recruited to College the same thing happens- Encouraged to play Safety. https://247sports.com/Season/2021-Football/CompositeRecruitRankings/?Position=CB Jason Marshall is ranked as the #2 Cornerback recruit in 2021. His 100m time is 11.13 and his 200m is 22.29. https://stonybrookathletics.com/sports/mens-track-and-field/roster/jason-marshall/5990 There are plenty of white HS players that can run sub 11. The coaches will justify not playing them as CB by saying they only have "straight line speed" or some other bs. Welcome to the caste!