The modern definition of diversity seems to be "people who look different but think alike".
I totally agree with that. I've been through so many interview processes where a hiring decision was made purely based on the interviewee's "cultural fit". Sometimes this meant turning down a completely capable person just because the interviewers were worried about how that person would fit in socially. That's sad and the reverse is equally bad.
Hiring is such a fragile process. The ability to make an accurate judgment on a person after an hour of interacting with them is nearly impossible. Maybe the interviewee is incredibly smart but so happens to be very nervous because a lot is riding on getting the job. Maybe the interviewer is having a stressful day so they have a hard time connecting with a stranger. I guess this means that people tend to gravitate towards the familiar and what is familiar is what is already around them. Then a self-fulfilling prophecy is created.
To help solve this problem, I think we need to somehow improve the hiring process.