I can't agree more.
As a person who has done over 1000 flood claims as expert for either the NFIP or homeowner, not having flood insurance is stupid. It's not something you don't need until it's already flooded. It's something you need now. It's generally cheap and the cost of repairing even an average house is expensive.
Most of the flood damaged houses we dealt with after Sally almost 3 years ago had less than 1 foot of water. The average price per sq ft was about 80 so if you're prepared to have a 3000 sq ft house cost you 240k instead of the 500 or 1500 for flood insurance, then fine. If you don't have 200k around to fix your flood damage then pay the insurance.