Why does the concept of "working hard" have to be a categorized by race when it is largely based on individual circumstances such as family income, parental upb

Why does the concept of "working hard" have to be a categorized by race when it is largely based on individual circumstances such as family income, parental upbringing, and immigration history? Someone who individually works hard that is a member of a group that is not considered to be hard working (or vice versa) would still be treated unfairly by this proposed system, making it no better than the status quo.