It's true that SF has lost a lot of black people, but the proportion of white people is lower in 2020 than it was in 2010, which is lower than it was in 2000, etc. This is because of the Hispanic and Asian populations, plus mixed-race people.
> I especially love the "white" part when the less urban SouthWest has the highest black population in the US
I don't doubt that you can find rural areas that are mostly black, but what do you mean by "less urban Southwest"?