I can't completely disagree with what you wrote. Still, we have affirmative action, quotas, bonus SAT points, and racial preferences - all based on race.

We have HUGE socioeconomic delimiting data, based on race: truancy, HS drop out rate, teen pregnancy, fatherless families, CRIME, etc.

There many physiolgoical, biological differences in races: Average IQ, temperament, age at first menstruation, likelihood to have twins, likelihood to have head lice, immunity from various diseases, tolerance to some foods/alcohol, bone density, heart size, height, weight, etc.

We know most people prefer to date same race (we know this from dating site data and neighborhood choices for home buying/renting).

85% of churches are 90% or more same race.

People prefer to live around, go to school with, socialize with, be served by, and marry people of the same race.

In a 2014 survey, the Public Religion Research Institute found that the average white American has 91 white friends, one black friend, one Latino friend, one Asian friend, one mixed-race friend, one friend of an “other” race and three friends of unknown races.

The average African-American has 83 black friends, eight white friends, two Latino friends, no Asian friends, three mixed-race friends, one friend of an “other” race and four friends whose races are unknown.

Further, 75 percent of the whites interviewed in the study had no friends of other races. Among black respondents, nearly 66 percent had no friends of other races.