It's a nice catchall phrase for all kinds of discrimination that would be illegal if stated explicitly. If we call it a gut feeling or culture fit, it's suddenly legal.
Cannot ++ you enough.
In my experience, people prefer to surround themselves with those similar to them.
The same holds true for any software organization.
Just as it was important to people in the pre-1960s southern US that their children only go to school with children whose families they were "comfortable with." Somehow, they've since (somewhat) figured out how to adjust to their discomfort.
