Why do we subsidize flood insurance?

[Cicada]

20. We are the insurance company - FEMA sells the subsidized insurance policies.

The National Flood Insurance Program offers subsidized flood insurance in more than 20,000 communities. Because no sane Insurance Company would sell for far less than the true cost. I propose that we raise prices to the real cost after we pay off once at the subsidized price. Those owners who are trapped and can not sell out and move can be bought out because they are otherwise screwed. That buy out is free money for them. If they don't like it they don't have to take it. But after we rebuild their house once after they have paid artificially low insurance premiums then they should pay the real cost of living where they do. You want to rebuild twice before we kick them off? Ok, twice. But global warming is coming and it is suicidal to ignore that. People need to move to higher ground.