Everything, including income, is eventually correlated with race. The point I was making counters "does not matter how, just the outcome matters": The model disapproved you not because you are black, but because you have a low income. There is societal racism there that needs addressing with policy and regulation, not by handicapping your model by throwing away non-protected variables. The -perfectly legal-outcome will be that fewer people of color receive a loan.

I know that you can't use just any old variable, but I tried enough to know that music genre would probably be an informative feature (dibs on providing loans to classical - and Judeo-Christian religious music lovers, you are free to underwrite the dubstep - and ghetto rap fans).