Your position on this issue is not based on reason or science, but on dogma.
Nothing is ever really settled. And certainly not that topic in particular. How could it be, considering how controversial it is? (This very topic is another proof.)
>the fact that race is a social and cultural construction rather than some genetic reality
That is an absurd claim. I'm well aware of the sensitivity around this topic. I wish we could research it freely, but I can see why people get very agitated about certain findings. I can see why it's unpleasant. Still, just like you can't research dermatology, immunology and other fields of medicine without taking race into account (the idea that racial differences are only skin deep completely breaks down when it comes to finding bone marrow donors), if it turns out that there are also racial difference in cognitive or behavioral traits, it's important to know for research on diseases like Alzheimer, or indeed for research on psychology, sociology, etc.