> Preventative dental work is dirt cheap and corrective dental work is relatively rare, and costs rarely spiral out of control. That sounds like a much better deal to me, as an insurer, than insuring any other body part.
When costs are easily predictable, that's actually a terrible case for an insurance model. Insurance is about smoothing risk, not making things cheaper. In fact, for services that are relatively cheap and predictable, insuring against those events will always be more expensive than paying for them out of pocket, because of the additional overhead.
Financially, the expected value of insurance is negative (the sum of all expected payouts is less than the sum of all future premiums). The reason it's valuable is because it reduces the variance in the month-to-month payments, which is a useful product for some people.
