During a hurricane, you assume everything on the first floor to be a loss so usually people may have their pools, have granite/tile flooring and do not have carpet etc so that way after a flood/hurricane it's easy to clean/fix up.
Most houses I have lived in, and the houses my peers owned, were all one story houses. Those who lived in what insurances labels as "known flood zone" areas still had carpet, and the houses are decorated no differently than the houses I have seen in California when I lived there, as well as Michigan where I currently live.
We also were able to enroll in flood insurance without any issues. Granted, it's extra insurance on top of typical home owners insurance, but Allstate had no issues providing us with flood insurance for over two decades of living there.
Is this perhaps how the more wealthy people live, or is this maybe how a specific area lives? I have legitimately never heard of people purposely furnishing their first floor as if it were a basement. I have seen the trend of moving away from carpet, but that is a more general trend that I am observing here in MI, as well, so I am not entirely sure it is can be directly linked to home owners worrying about potential flooding.
I do agree though, I like to visit Florida here and there but I would never want to live there permanently.
An apartment building just south of SF was recently condemned and torn down because the cliff it sits on is slowly falling into the ocean.[1]
[1]https://www.latimes.com/local/lanow/la-me-ln-pacifica-apartm...