Just because a city is near a port does not mean that exact spot of land is a flood zone. Just because you live in a fire prone region does not mean your house cannot be covered. There are a lot of ways to retrofit homes for fire prone areas including landscaping changes.
You’re entirely correct that there are threats to buildings everywhere. My point is that most state/government programs treat areas that are impossible to underwrite. I am suggesting that in those cases perhaps it’s more cost effective to not underwrite the risk. You could shape it different ways, from not underwriting it at all to underwriting the risk but on a loss, paying for the relocation not rebuild.
This has nothing to do with being a public good and more that zones that are known complete loss high risk zones should be mitigated. Yes nature exists everywhere but you can generally underwrite things when your entire pool is not experiencing a total loss.
Is suggesting a home built in a flood zone should not be rebuilt arbitrary? Is suggesting homeowners in high risk fire zones take the steps to alter their landscaping to reduce risk arbitrary? You are sharing all these feel good sentiments and I am simply saying it’s not feasible to underwrite these activities.