Every year, humanity grows richer, more resilient to natural disasters, and more capable of predicting natural disasters and their negative outcomes. The point of insurance is to spread the expected burden of calamities that will affect a minority of a population to the entire population, so that those affected will have a financial safety net. This principle works regardless of how disastrous or prone to calamity a…
I agree with your analysis of how insurance works. But, wouldn’t the burden of calamities only spread amongst the insurance holders? I am not sure what the factors are, but if a lot more people go without insurance (because they are independently wealthy or live in an uninsurable location), doesn’t change the calculation?
As an insurance buyer, in a hypothetically ideal market situation, you would want all those who also purchase from the same insurer to have the lowest risk of needing an expensive claim paid. The lower the expected payout * risk of disaster means lower premiums for the insurer to still make an expected profit.
I think what will happen is simply: Houses are built in places which are more insurable, existing danger-prone houses will exist until they are destroyed, until then they will increasingly be status objects for the elite who can afford the loss and have inaccurate risk appraisal. The fact that so many valuable objects are kept in Malibu/Palisades homes despite fires happening there a lot (as recent as 2018) indicates homeowners in disaster-prone areas aren't acting perfectly rationally.