Honestly there have been studies linking fluoride to lower intelligence and there are many studies stating that it doesn’t really make a difference in dental health. If you’re brushing your teeth properly you’ll be fine.
Most of Europe does the put it in their water and they’re fine.
Edit: I say this as someone who absolutely does not want trump or rfk dealing with any of this. Even a broken racist worm ridden clock can be right once in a while
https://pmc.ncbi.nlm.nih.gov/articles/PMC3491930/