The truth is unspeakable because it is unpalatable in its full form, but one can attempt to guess that it comes from the idea that, in a vacuum, all races would be represented equally at universities and that any deviation from that presents an outcome resulting from humans artificially inducing changes in the total population applying.

i.e. the idea that if a high number of Asians are making it in despite low prevalence in the total population, then it is because we have created a system that serves them disproportionately (and therefore unfairly).