This is why inter-racial IQ study is not done with the WAIS or WISC mentioned in said article, which are accurate predictors of functionality within a society but highly influenced by knowledge of language. Instead, such study is done with purpose-made tests which examine pattern recognition and retention without use of numbers or letters, such as with basic shapes, shading, and cross-hatching. Raven's progressive matrices are an example of such tests.
Dishonest scientists will often omit that such tests exist and were used to research the old scientific consensus on human races, while pointing and shouting excitedly at culture-specific tests.
Well... for starters, it benefits anyone who values truth. A society which is conditioned to lie about racial issues because muh feelz, muh oppression, muh cancel culture, etc.. cannot be said to value truth, and everyone in it will know it. They will know it is normal to lie when it would be inconvenient to speak the truth, and this will color everything that society does.
It is also a litmus test. the truth of what I have posted is obvious, there's an entire half a continent where there are no relics of note from antiquity... or even five hundred years ago! Sub-saharan Africa is a desert of ingenuity that strongly corroborates what scientists discerned with IQ tests -- its populations were and are woefully unintelligent. Leftist "guns,germs,steel" theory has tried to paper over this but as a cover their excuses are paper thin. We brought tens of millions of Africans into America, a prosperous and orderly European nation, poured wealth in their pockets, provided them with Western education, and what do Africans do in America? Tear down the places they moved in to, make them ugly and disgusting, consume every resource made available to them, and victimize whatever populations are adjacent to them, all the while bearing false witness about their terrible "oppression".
People who care more about popularity and fitting in and avoiding consequences, will of course speak the convenient racial equality falsehoods. This leads to the next point.
"The vast majority of people who identify as right" are even more complacent than "the vast majority of people who identify as progressive". Their chosen role in life is that of the peasant, the consumer. Almost none of them will fight for anything, and they will obey whoever holds power as long as they have food and media to consume. It is more important to cultivate a minority capable of holding power, than a feel-good majority that will sit on its thumbs.
Edit: added meme I couldn't find while posting.