Why the dimension of race and not other dimensions? It is a real dimension with cultural and medical significance. Cancer presents differently for different races for example.
When you have large pseudo monopolies it is important to have diverse groups of people running them to avoid effects like this that can make marginalization worse.
Another classic example is voice recognition and accents. By not having more Spanish speakers at a company, if your company makes a voice recognition product it is easy to have blind spots. Your product may fail for those with an accent, and you won’t notice or think to measure along those dimensions.
I agree, however, that strictly proportional representation is not important. However promoting diversity is important and when you have numbers like 3 or 7 percent it’s easy to end up with large, important sub teams with no representation for historically marginalized subgroups. And this can lead to worse products, especially when looked at from the point of view of marginalized subgroups.
The main point of the article is that it is pretty sketchy to be hiding these numbers