In my view, people who are able to question the legitimacy or applicability of IQ as a general measure of "intelligence", an idea that is highly contextual, are probably intelligent. They are at least smart enough to question social conceptions and to recognize the contingent nature of such conceptions. People who uncritically view IQ as some kind of unassailable proof of "intelligence" may be good at solving certain classes of known problems but, I really am not surprised that they may lack the imagination to contribute meaningful things to society, as a blind faith in a measure developed by fallible human beings is indicative of limited thinking /creativity.
Obviously someone can score well on an IQ test and question its validity as a signifier of intelligence, just as one can score poorly and place a strong degree of faith in it—but the way someone approaches it, in either case, is a very telling indicator of their own intellectual biases and limitations.