Alan, what you are saying is misleading to anybody with a crawl space.
I have built, maintained and was a hvac contractor for years. I have been under hundreds of houses in SC. 70-80% have crawl spaces.
The fact is, crawl spaces are meant for air circulation in warmer months to
keep wood from condensation. Crawl spaces are where many furnaces are located.
Crawl spaces many times have the well pump and pressure tank there as well.
Crawl spaces have nothing to do with preventing flooding.
Trailers have a crawl space, do they not flood?
How many homes in NC or SC that are flooded right now also have crawl spaces?
Only your elevation, drainage of your property (whether man made drainage or natural slope drainage)
will prevent flooding.
A crawl space is not flood insurance, trust me.
Not a argument, just facts.
Have fun
Doug