People have been saying that for millennia (quite literally).
There's a very good reason we build on the flood plains: up until very recently, flood plains were the prime breadbaskets for humanity. Villages, towns, and the cities that developed out of them, therefore, had to be near-to the sources of food. When your town/city was first settled, Wasted, the idea of refrigeration, moving food from one continent to another and keeping it fresh, etc, was at best a pipe dream, if it had ever been conceived of. The only food you could get from outside of local growing was salted, smoked, or pickled. The best cities and towns are in places that flooded every year. Cairo, for instance, has had to deal with yearly floods since the time of the Pharaohs - until the construction of the Aswan High Dam. The classical centres of civilization - Baghdad, Mumbai, Beijing - are all on rivers that flood. It is only very recent technology that allows us to consider dropping a city away from rivers, but we still tend not to do it when possible. They just make it easier.