> if we follow the meritocratic ideology that everyone has the same opportunities available to them, it would be a natural conclusion
It's a natural-sounding conclusion that has no evidentiary basis in reality. Different cultural and ethnic groups value and specialize in different things, which over generations make for significant differences in the average member of those groups.
This is one of the biggest fallacies when it comes to policies that incorporate preferences based on racial, gender, or whatever other demographic basis you can think of: that absent biases (or "structures of oppression" or what have you), each and every subsection of society will reflect the composition of the whole more or less perfectly.
Asians are 6.3% of the US population yet comprise only 0.1% of the NFL (literally a handful of players among 1500+ in the active roster). Is it because football racially discriminates against Asians? No, it's because Asians as a whole are not very interested in being professional football players. There's nothing that stops the odd individual of Asian descent from making it to the NFL.
Women are roughly half of the population yet comprise only 13% of taxicab drivers. Is there a taxicab union that's preventing women from joining? No, on the whole women aren't very interested in being taxicab drivers. There's nothing that stops the odd woman from being one, though.
So on and so forth for literally every slice of life you can think of; you will never find anything that reflects the demographics of the underlying society. Hell, even the demographics of the 50 states don't reflect the demographics of the country as a whole. Vermont is only 1.5% black, whereas Alabama is nearly 30% black. By that metric, Vermont would be 20x as discriminatory against black people, wouldn't it?