Racism isn't useful and isn't actionable at a policy level.
Let's suppose there is some trait X (could be IQ test score, high jump ability, whatever) that is statistically variant by rigorously defined race. Group A scores on average 98, group B scores on average 103.
The median difference between groups doesn't actually matter, because individual scores are spread on a normal distribution. Therefore some percentage of individuals of group A will score higher on trait X than individuals of group B even if on average they do not.
So how can you effectively filter out individuals for entry into some special program? (for example, the high jump event in the Olympics)
Well, you have to test each individual. And if you want the very best, it behooves you to test each individual as fairly as possible, because there's always a chance that you will sample an individual from group A who is a super star, and also find an individual from group B who is a dud.
And it is the same for any other trait you would like to filter for.
Racism is an attempt to find a convenient mental shortcut so that it may provide cover for hatred of an out-group. But racism is ineffective and stupid.