Well, is some respects your plan does make sense, but that would freeze out some owners and restrict that area to the “elite”. The little guy/gal that services those communities as clerks, shoe salepeople, dental assitants, etc—would be forced to move further inland out of EV range.
In many respects that’s already happening, if you look at where I live in Jacksonville, go out the beaches area, much of that area is where the truly wealthy live especially in South Duval and Northern St. Johns County.
There has to be a new approach to our thinking about Insurance in Florida, so many people have moved here and more of them are living close to the ocean, any decent hurricane tears up the houses of primarily newer homes.
The other solution or perhaps part of a new hybrid insurance system is establishing building codes that require homes to be built to withstand at least a Cat 3 hurricane, in low lying areas, they must be built on stilts high enough to handle a storm surge to a certain level.
You could do that to any new construction and require it on any homes built to replace homes destroyed in a hurricane. It would take time, but homes not built up to hurricane standards would eventually get replaced.