Yes, in my experience "well-rounded" is 100% a made up characteristic that generally means "person like the person doing the assessing". Another reply mentions "interesting conversationalist", which mostly selects for someone having the same cultural background, and is the opposite of "diversity" or whatever this week's excuse for doing this stuff is.
You are making a lot of assumptions here. People don’t find others interesting conversationalists if they have the same background. Maybe if all you focus on is skin color, you may be right, but does somebody in Ukraine have the same background as somebody who grew up in South Florida? Does somebody who grew up in the San Francisco have the same background as somebody who grew up in Marin?
If all you look at is race, you might say yes, but these are very different life experiences. Also, there is such a thing as somebody being so different that it’s not possible for others to relate to them. Likability is not unimportant when it comes to working in a team.
Laptop professionals are remarkably similar wherever in the world you find them these days. London, New York City, San Francisco, Tokyo, Paris, etc. have all been converging on a similar set of tastes, fashions, beliefs, and consuming habits. So it's possible to have great geographic diversity, without introducing much diversity in terms of culture, class, political and religious beliefs, etc.
And conversely great diversity without geographic diversity or racial diversity. Diversity is oversimplified and measured incorrectly from the DEI perspective.