There's too much inertia in favor of fluoride being beneficial for any serious researcher to risk their credibility. Everyone "knows" fluoride makes teeth stronger, like lettuce being healthy to eat, or global warming is human-caused.
In fact, even discussing the possibility is too much for most people to entertain. They think you're wasting their time with fantasy and falsehood, like conspiracy theorists always do. Fluoride being bad for teeth is as believable as airliners dropping chemtrails everywhere, or jet fuel not "spheroiding" steel after hours of heating.
See? Even posting about the idea of researching it merits a downvote. The idea that fluoride has no benefits is as popular as Apple and Microsoft merging.
In fact, even discussing the possibility is too much for most people to entertain. They think you're wasting their time with fantasy and falsehood, like conspiracy theorists always do. Fluoride being bad for teeth is as believable as airliners dropping chemtrails everywhere, or jet fuel not "spheroiding" steel after hours of heating.