For completeness sake that could potentially also cut both ways. If it turns out that fluoride does lower academia potential then it would be occurring in the brain's most important development period. Once they are adults they would have to live with that artificial limitation. Though they do say ignorance is bliss.
My personal preference would be to let the scientists, researchers and skeptics put on boxing gloves and in the mean time give the child a healthy diet, teach them to use a water-pick daily to avoid not only cavities but other potential issues related to diet and gum hygiene.