And hey, believe it or not, all have been questioned. The forces that took eugenics and IQ testing in awful directions and way too far, frankly, wasn’t science, but people’s own religious and sociological views imposed on the science. People who, at that time, had a great deal of authority, and wielded it to do everything they could to assure they kept that authority. This is why science itself is always questionable, even unquestionable facts.
Also because several times when the scientific community has accepted something as established fact, young students and barely post-students have come along and actually found the answers to questions that most never even dug into, or dug into with little return. They either greatly expanded on what was known, or turned what was known on its head. More often the first, believe it or not, unless they were questioning religion more than science.
So at the very least, please get straight what’s actually going on before you excoriate everyone you were taught to disagree with.