You keep ignoring the fact that the "nanny state" has nothing to do with fluoridation, other than encouraging local governments to do it with monetary support. A large percentage of the country's water supplies are not fluoridated, if what you are saying were true, everyone (with some exceptions) would have fluoridated water, just like everyone has innoculations or pays taxes.
If the population were not forced to take care of those who are least likely to take care of their own health needs, you would have a point, but since the "nanny state" spends many millions (if not billions) of dollars a year to treat dental problems, fluoridation is a simple, COMPLETELY SAFE, and cost effective way to reduce those expenditures.
You accept the nanny state for water chlorination because it benefits the herd. The principle is the same. The cost/benefit ratio is a no-brainer.