Devil's advocate here. If Blacks' average income is 69% of white/non-Hispanic income, then how is a Black person to qualify for the same higher-sale price house as Whites? Seems to me the issue might be the INCOME needed to buy the house, not simply cheaper houses. If it is the fault of income, appraisers bear no responsibility for that. If it is sale price, we use comparables in a neighborhood and don't research whether the house is owned/occupied by White vs non-White. We don't pick comps based on race; they're picked by comparable condition, size, close proximity. So again, we don't force certain people to live in a more- or less expensive neighborhood. It's just a red herring. And BTW, I am so very happy in my own neighborhood in CA where within a 4 block radius I have multiple neighbors of least 12 different ethnicities. It is a little circle of joy, and everybody gets along fine.
On the other hand, I HAVE lived in a city that was/is fiercely racist, which was one of the first cities in the US to have forced integrative bussing, where I can still identify the ethnic neighborhoods to this day, and if you're 'where you don't belong' you hear about it even from the local police precincts. And in THAT city, the crime statistics reliably follow the the patchwork of various ethnic neighborhoods. There are clear distinctions between German/Yugoslavian, Mexican/Puerto Rican, Black/White, English/Irish, Jewish/anti-Jewish. Misery lives in that city.