You are 100% correct, but also 100% missing the point. When I say white people are more likely to carry the gene for cystic fibrosis, or black people are more likely to carry genetic risk factors for kidney disease, nobody will reply with a long winded explanation claiming that statement is invalid because "white" and "black" are not scientifically valid because... Comments like yours appear only when the topic of intelligence comes up, so I conclude that the real problem you have with this is the subject of intelligence, and not the categories.

And when the science on race and intelligence came out, the response of the scientific community was not "your categories are bad, and here is my study on intelligence that actually uses scientifically valid genetic groupings." It was "any further science on this subject will not be funded and if you express disagreement it will risk your career."