The FDIC was created because there were many bank failures that occurred in the 1920's and early 1930's.
The FDIC also made sure that insurance provided a guarantee that in case of death, damage, illness, etc, there would be a payment provided for that specific reason.
Why? It's because without the FDIC, banks would have never re-opened, and people wouldn't have had anything to rely on if something would have happened to them.
The FDIC is very useful and helpful to both banks and people.