[throwaway8689]

This study looked solely at impact on dental health. Other studies tell us it is associated with stomach cancer and infertility.

[dash2]

Is dental health not beneficial?

[20after4]

I guess it's arguable whether better dental health, plus cancer, could be considered a benefit. Would heavily depend on the rates of cancer or other harms vs. the rates of improved dental health. Certainly without thinking too deeply about it, childhood cavities would seem vastly preferable to nearly any sort of cancer unless the risk is minuscule.

[throwaway8689]

Assuming you are not being disingenuous: there is a trade off with a lot of uncertainty - other things are also implicated in stomach cancer, and at the same time untreated dental disease causes other health problems too.

But I prefer to rely on brushing my own teeth and avoiding certain foods to maintain my own health, rather than have a medication added to my water supply because the guy next door does not take care of his health.