A disaster encompasses many things, not just losing a data center. A disaster can be someone deleting a single table (or even row), coffee spilled on a server, all the way to a major disaster like a hurricane that removes your data center.

I've seen plenty of people focus on the big disasters and then not be able to handle small ones. It's all levels of disaster recovery that need to be handled, but IMHO, the small ones, the deletes, the corruptions, are where you have to start. They are way, way more likely than your entire data center being down.