Yeah. I don't understand how intelligence can be accurately measured across ethnicities (considering that most ethnicities aren't monolithic and isolated) in the current limitations of social inequality, barriers in access to education and workforce, recovery from colonisation, racism, gender prejudice and so on. I don't know how can you possibly account for all of that. A very intelligent and capable woman from post-colonial country with practical skills might score much lower in IQ tests than a less intelligent and less capable university student from a wealthy country who has done IQ tests before, and it has nothing to do with race and everything to do with inequality.

They will have to account for racism and gender bias even in the context of wealthy countries. If a very intelligent person is systematically discriminated, told that they are less intelligent, experience racial or gender prejudice in education and workforce or even outright harassment, have low expectations and little representation to inspire them, it can become a self fulfilling prophecy of how well they perform. And somehow account for the Indigenous knowledge, too, when it's been only in the recent decades that some Indigenous skills (like more efficient land management techniques) started getting proper attention.