Insurers Are Deserting Homeowners as Climate Shocks Worsen | Without insurance, it’s impossible to get a mortgage; without a mortgage, most Americans can’t buy a home.
Besides then they can turn around and sell some of that land that's not underwater yet back to the government for "temporary" refugee resettlement tent cities
Buy for cash, rent until the next natural disaster destroys the building and… then what?
If we're talking about Blackrock/large REITs, the answer is "get bailed out by the government (despite it abandoning the little people to the wolves) because you're in the big club 'too big to fail.'"
This will certainly depend on where you live but my impression is that generally you only need to have it when you have a mortgage specifically because the banks require it as a way to protect themselves. If you pay cash nobody cares.