if, for example, your liquid net worth is 100x the replacement cost of your
home.
and for the vast majority of people, rebuilding their home is not feasible with
their current net worth.The same is not true for auto insurance in most states, though most also have an option to self-insure by putting up collateral.
Without such insurance, specifically the "injury liability type" with its limits; then if someone gets injured on your property there may be no limit to your liability.
So even people who could afford the loss buy insurance because it is the best method of limiting intangible risks.
You can put the house into a limited liability company, which theory should limit the liability to the value of the house.
Depending on whether director negligence was involved etcetera.
For instance, apparently the EU is currently considering a regulation that houses must be energy efficient. Getting a current house into compliance would cost on average $50k. That kinda stuff adds up.