How is hiring along innate characteristics going to increase diversity? Are you of the opinion that a group consisting of Oprah Winfrey, Mike Tyson, Dave Chapel

How is hiring along innate characteristics going to increase diversity? Are you of the opinion that a group consisting of Oprah Winfrey, Mike Tyson, Dave Chapelle and Barack Obama is homogenous just because they're all black? Do you think a randomly picked candidate from that pool would equally increase diversity in a team of college educated middle class programmers, or might there be a difference between their perspectives that goes beyond "African-American"?