People find the truth that standardized testing and school placement is mostly expressive of IQ uncomfortable. IQ is mostly genetic. When this doesn't evenly distribute across people groups people find it problematic. Again, this truth is uncomfortable.

North east Asians in the US at or below the poverty line score better on average on the SAT than African-Americans from households with incomes above 100k. If there was a socioeconomic lever to pull we should pull it. The evidence says there is not.

Look it up.

I don't think we can create true equitable solutions until we get past these myths that everyone is just the right environmental conditions away from high academic achievement.