He's saying that within the Black community, there are fewer people who (for whatever reason) have the skills necessary to be a CRUD developer.

Reasons may include, but are not limited to:

- poverty and access to education

- cultural factors pertaining to the value of higher education

- cultural factors pertaining to the types of jobs that are valued (e.g.: perhaps Blacks take jobs that confer a certain status or that are seen as directly giving back to the community)

If this is true -- and I personally find it plausible -- then we would indeed expect blacks to be under-represented in software design.

tl;dr: Perhaps the bias in hiring is a reflection of a bias in competence. Perhaps Blacks are, on the whole, poorer candidates? If that's true, then the correct approach is to focus on education rather than punishing employers.