Toothpastes have fluoride. There is no need for it in water. Frankly the best thing to do is have your kids use a proper Braun spin brush and water pick.
If you wear a seat belt, you don’t need an air bag.
Laws are directed towards the lowest caste. We need fluoride in the water because kids in the projects won’t brush their teeth. We have to protect them from themselves. When they get gunned down in the street, we want to say at the funeral “Doesn’t he have nice teeth”.