Earlier quoted context omitted.
Because they added it to salt and toothpaste instead.
I can tell you that salt is not fluoridated in the Netherlands (most people who care about cooking use pure sea salt anyway). As for toothpaste, almost every toothpaste anywhere in the world has it. There is evidence both ways, the original reports were that children's dental health improved after they stopped fluoridation in the 70s.
Has that effect been persistent? I would think the news of flouride being removed from the water would cause an increase in dental health diligence, but I would also be surprised if that effect didn’t wane over time.