Probably because the population they recruited participants from had a similar distribution. "Diversity" as a slogan is somewhat misleading, because what these

Probably because the population they recruited participants from had a similar distribution. "Diversity" as a slogan is somewhat misleading, because what these initiatives try to do is to counterbalance negative selection of characteristics like skin color, parental income etc which shouldn't matter in coding. Also "minorities" has become a difficult term because of spatial segregation, demographics, blending, and even the decline of racial prejudices (which is a good thing) blurs the lines of who's the majority and who's the minority in a particular issue.