Is the world becoming uninsurable?

Like we see in California, when the government sets a price ceiling, insurance companies just leave. Same in Florida. If the free market truly was allowed run normally, the insurance rates in Pacific Palisades or on the Florida coast would be so high that no one could afford to live there. Is that a bad thing? If someone was living in a house near where they tested missiles, we'd call them crazy. At what point can we say the same about people building and rebuilding over and over in these disaster areas.

There should be a way to build fire resistant buildings to reduce the cost of insuring them, likely this would be the solution in California without price caps.

You can build out of concrete and use fire resistant materials like metal or tile for the roof and your house is nearly fireproof. These buildings would be realistically insurable in both California or Florida. They would cost more to build, not THAT much more though especially if land costs many millions, an extra 50k - 100k to build out of concrete is a very reasonable expense.