That's only really the case for cash buyers though, right? If you have a mortgage, the bank will demand you have sufficient insurance.

There's a case to be made that places like SoCal and Florida having State/Federal discounted fire or flood insurance is an obvious problem. I can understand the "we don't have a way to kick everyone out of this dangerous and potentially historic area" zone, but it ends up being a subsidy of taxes from people living in more sensible areas to pay for the predictable damages to more risky areas.

If you're rich enough to buy anything in LA in cash, you're likely rich enough to eat the loss if your house burns. If you needed a mortgage then you're constrained by the insurance companies that increasingly are pulling out of areas like this for exactly this reason.