I think it was a reasonable point. Inter-generational wealth transfer is very durable over time. Whether or not someone inherits "house money" (and can plan their lifestyle and tolerance for risk according to that expectation) still corresponds to closely to race in the US.

A family history of slavery might not necessarily be the cause, but having ancestors who were allowed into the property club, at a time in the past when there was still headroom to pump appreciation faster than inflation, makes a difference in what people inherit.