Fluoride might be sufficiently safe in the drinking water and it’s slightly effective but you know what would actually help? Dental hygiene. Fluoride in a form that actually stays with the teeth for more than a split second and has a chance to soak in instead of being drunk, i.e. toothpaste. Fluor in tap water is an absolute stop-gap measure introduced by a country which can’t be arsed to have universal healthcare, they apparently can’t even be arsed to have a campaign to get people to brush their fucking teeth.
Stop-gap measure like the Teletubbies. No, wait, hear me out: The whole thing is a very scientific, and successful, way to teach basic language skills to toddlers parked in front of the TV. It does the maximum possible in the situation but the results are still worse than plain old interactions with actual people.