Affirmative action strives to achieve top down equal results at the expense of privileging certain people on the basis of their biological character. The right solution is bottom up economic stimulus to create equal opportunity, and it should support poor Black/Hispanic Americans as well as poor White Americans (of which there are a sizable and growing number).
You need look no further than the failure of Prop 16 - which sought to remove language from the California Constitution that provides equal protections and consideration to all Californians irrespective of race, gender, etc - to understand how deeply unpopular these sorts of strategies to rectify societal imbalance really are.
While I am personally largely socially liberal, I’ve never understood how Democrats unironically adopted a policy agenda that explicitly preferences certain people on the basis of race, which is quite possibly the worst way to address racial injustice.
Political game theory favors appealing to the margin and the margin is moderate. The margin doesn’t take an extreme stance on social issues a la San Francisco. Quite the opposite: they hear things like “defund the police” and liberals shouting down “all lives matter” and they feel rightfully as if Democrats are threatening their place in society. The progressive politics of exclusion and contempt are totally unfit to the task of winning the electorate just as much as the equivalent conservative extreme.