Even presuming that there were an actual benefit to water fluoridation, it is a topical treatment and serves zero benefit to that purpose through its consumption; this is akin to drinking sunscreen to prevent a sunburn or whatever.
Additionally, the consumption of fluoride leads to the unpleasant symptom of dental fluorosis.
Also, the fluoride derivative fluorine is a key ingredient in antidepressants, go figure.
Oh and BTW, the despotic murders Stalin and Hitler practiced water fluoridation.
* Also sodium fluoride is a toxic half-life acidic/corrosive poison.