The problem prominent and/or mildly successful scientists of all stripes run into is that they begin to confuse their imagination for a source of truth. Having been rewarded with success in their careers for having done the so on their way up, it is almost reasonable to conclude their imagination *is* a direct line to God, Truth, or Whatever.
Feynman had a chapter in one of his books about this phenomenon. Several actually, but I'm thinking not of the famous Cargo Cult Science speech but of his experiments with psychedelic drugs in the 70s, where he wrote he almost felt like he was one with the eternal truth of creation until the high wore off and he realized that what he actually did was smoke some weed and seal himself off inside a sensory deprivation pod.
And they key is that sealing oneself off and interrogating the wider universe are mutually exclusive exercises.
Maybe Phillip K. Dick was right, but you won't find out by consulting your imagination; you will find out with hard-nosed and clearheaded systematic investigation.
Maybe there is a genetic component to race and intelligence that's separate entirely from culture and upbringing. I think it's plausible too, but having read Charles Murray, for example, I find his analysis simplistic and insufficient to make the case. And the reason is most of his doorstopper of a book he's making charts and graphs of responses to opinion polls and extrapolating into his own narrative, not conducting controlled experiments or even looking for good solid natural experiments with sufficient power to make the case.
Now obviously the kinds of controlled experiments necessary to answer questions of intelligence and genetic as separate from culture and upbringing would take too long and need to cross some ethical lines we presumably care more about not crossing than we do about knowing the answer.
So the scientifically honest thing to do is to say exactly that: it's plausible but we don't have a way of knowing for certain. Period.