I edited my comment and straight up said I had it wrong. You’re getting upset with the wrong person. Use topical flouride, it works so well that it obscures the benefits of flouride in water. If you’re not gonna use flouridated toothpaste or mouth rinses, then flouridated water is better than nothing

I’ll have to find the link but flouride in drinking water has been shown to do little, if anything, to affect tooth decay. It also isn’t harmful to our health in concentrations found in tap water. More of a neutral thing than the “flOuRidE Is goNnA cAlCifY yoUr PeeNer GlAnD” that usually gets associated with people saying flouride doesn’t work. Idk what side of that argument the person you responded to is on but it’s not entirely unfounded

Edit: I had it wrong. It’s not that flouride in our water isn’t helpful, it’s just that topical flouride in things like toothpaste is more helpful, so in places where flouride is available in topical products, you won’t see much of a benefit from it.