As a nationalist and constitutionalist American, I strongly agree about treating individuals as such. However, the problem is that the left has demonized that approach and suggested that if a demographic underperforms, it's inherently because of oppression rather than culture or biology. These days, tribalism is the left's. If we ran an individualistic society, we wouldn't have to ask these hairy and unpleasant questions, but as long as the left phrases white, Jewish, and Asian success solely in terms of oppression, we'll be mistreating individuals of those ethnicities.
I agree that data on this is uncomfortable and can be misused, but (despite academia's wishes) science is not a tool for supporting progressive cosmopolitan perspectives. If people think that current policies are sensible, they shouldn't be afraid of what scientists might uncover about the nature of human genetics. Personally, I think I could logically defend egalitarianism and individualism in the face of significant racial IQ disparities. People who feel wedded to affirmative action and victimhood culture, however, are going to be hostile toward legitimate science in this area because it delegitimizes these institutions.