...its just a password to access a list of passwords.
Unless you never thought of, implemented, regularly did and regularly tested your backup of the database. Or... try to use it on more than one device - maybe even at the same time.
That's the main problem with KeePass. It's nice to have it offline, fully under your control and out of the cloud, but that comes with some responsibilities on your end. And now think of how the average user solves this. If you're tech savvy enough, KeePass is great!