> Race comes into the picture because having a different race often means you have different cultural aspects thats formed you as the person you are today.

If true and job relevant (that the cultural aspects had some effect on how they approach problems), that means that different races will have different success likelyhoods in a given occupation.

Why? Because success in a given occupation does not depend on all things equally.

> each individual grew up with a cultural background that does influence the ideas they come up with

Yup, and since different ideas are more useful in different occupations....