One must beware of the chicken-and-egg problem-- opportunity leads to performance which explains opportunity. To pick a very exaggerated example, if you look at the southern part of the US in the year 1850, you will find a large black population, but very few of them would score well on reading exams. By the exact logic of this thread, I could use that to assert that it is quite natural that there were also no black language professors in the colleges of the region, and we should simply embrace that conclusion.

Is everything perfectly reasonable in that situation? Of course not, because the role of the environment in establishing those conditions has not been established. If one makes no effort to examine that role, one would simply conclude, as often occured in this thread, that differences in the evolutionary environment must be producing genetic differences in reading ability, which explain the poor reading performance and the absence of black language professors in 1850.