When I was an employee at Google and did interviews, I was told that for diversity reasons, I couldn't ask where an interviewee "was from" because that would bias my decision.

I'm sorry, but other companies and fields don't prevent this question, and have far less bias (well, employee distributions that more closely map to underlying population distributions) in hiring. Most of what Google is doing is to reduce its legal exposure to class action hiring lawsuits, not righting wrongs, as much as their leaders like to say they are.