Let's assume for purposes of argument that different "races" of humans have statistically different IQs.
Okay, so what?
for an individual it should make no difference, you are who you are. but for group averages it does make a difference. the reason blacks do not perform as well in cognitively demanding fields is inherent ability not white racism. it should be expected that more whites pass will pass firefighters test, high school exams, and the labrynth of paperwork and taxes to become wealthy. its not (only)racism holding blacks back, mostly it is their ability. groups of whites and blacks of the same IQ will have very similar rates of success.
You know...if I had any reason to believe that we actually lived in a meritocractic society, I'd completely agree with you.
But we don't live in a place where merit necessarily means reward.
And if you're starting at the bottom of the heap, as most Blacks had to, then this fact that merit isn't rewarded in relationship to what you really contribute to society is very important.