Single family zoning is about what you are forced to build, not about what people choose to live in. In fact, if the demand for detached SFHs was as real as you

Single family zoning is about what you are forced to build, not about what people choose to live in. In fact, if the demand for detached SFHs was as real as you suggest, there would be no downside to zoning for multi-family; nobody would prefer to build it! Also, ultimately, the history of single family zoning is definitely all about race.