As long as you don't live on an island or have coastal property...
A lot of areas won’t make sense to insure due to storm risk well before they’re at risk from literal sea level risk.
Not in an emergency scenario but more like "it doesn't make sense to stay here anymore".
I mean, I can tell you why. It's not feasible if it costs too much. If it makes sense (i.e. the land is worth X and cost of a wall is some fraction of X that people can afford) people will do it.