When I moved out into the country and we had well water, I started getting more cavities, until I realized what the problem was and started rinsing with flouride at night.
That seems to have fixed it. You don’t need flouride in the water if you use the right kind of flouridated toothpaste, and rinse at night.
But since a lot of people probably won’t do this, it makes sense to add it to the water, IMHO.
Like hell you do.
I don't even want to know how you can post something so evil and live with yourself.