It seems like there is an inherent contradiction in logic at play.
If you believe that racial disparities result in real harm to certain groups, you would expect the impacts of those harms to show up on objective metrics of capability.
The only way to have a measure blinded to the impacts of inequality is to ignore everything about the individual being measured. Perhaps everyone has equal potential and capability at birth, but everything after that is tainted by their unequal environment.
If you believe that racial disparities result in real harm to certain groups, you would expect the impacts of those harms to show up on objective metrics of capability.
The only way to have a measure blinded to the impacts of inequality is to ignore everything about the individual being measured. Perhaps everyone has equal potential and capability at birth, but everything after that is tainted by their unequal environment.