If one can define culture without relying on biological heredity, sure again. It would be better, however, to address the underlying issue: lack of cross-cultural knowledge that causes the reduced outcomes. (And why Māori students aren't getting into those programmes in a race-neutral process.)
I feel that deconstructing the entire culture of race is not really a practical suggestion for solving the issue. This outcome is not uncommon when you ask those against DEI how they would solve it. Often they recommend systematic solutions that they would in the end also be against because those solutions would surely use race as a targeting mechanism.
If one can define culture without relying on biological heredity, sure again. It would be better, however, to address the underlying issue: lack of cross-cultural knowledge that causes the reduced outcomes. (And why Māori students aren't getting into those programmes in a race-neutral process.)