There is no other place to build there, and Helene's flood was orders of magnitude bigger than any prior flood, so it reached areas that had been assumed to be safe. Much like what is about to happen to Jamaica.
And landslides happen where you never think a flood will happen. To say Helene didnt have any "wiped off the map" damage as one poster said, is just wrong. Ask Chimney Rock and Bat Cave and Minneapolis and any number of other communities. When the mountainside comes down, everything is gone.
I pray for these poor people in the way of this one.