[AnthonyMouse]

Because state insurance programs have perverse incentives. Insurance itself is a moral hazard. You buy insurance and then do something risky you wouldn't otherwise have done because if it goes wrong you're insured. It's also an opportunity for outright fraud. If the book value of your property is higher than its true value, you carry insurance and then set a fire.

Private insurers have the incentive to price this in. If they can predict you're going to be high risk, or uncover evidence of arson, they can charge you higher rates or refuse coverage. For state insurers the cost goes on the taxpayer and if claims are refused for legitimate reasons, the perpetrators go to the media and accuse the state of bankrupting their family. This puts pressure on elected officials to shift the burden of this fraud onto the taxpayer, whereas private insurers would push back because they have a direct financial incentive not to eat the cost of fraud and mispriced risk.