That’s absolutely untrue: if your only water supply is the fluoridated town water, then yes, you are forced to use it. One cannot simply decide to sink a well in one’s own backyard, even if you have a back yard. And if you cannot afford to purchase copious amounts of non-fluoridated water to drink, cook abs wash dishes, clothing and bodies, etc. with, then you are pretty well forced to us fluoridated water. The same thing with moving: It’s expensive to move and not within everybody’s reach. One may be unable to escape fluoridation.
One cannot simply fluoridate your tap water, either. One can us a fluoridated toothpaste but that’s about it for choices at the disposal of most people.