If you were to arrive at work in the morning to find that the building is just a burned out shell, your office, your systems, your entire business, would be up in smoke. Even if you have back-ups, maybe they were stored in the same room as your server; in a safe that was waterproof, smoke proof, and cyber proof, but not heat proof. And months of data is destroyed.
For your business that could mean client loss and revenue loss.
In that situation a Business Continuity Plan (BCP) would be your shield of prevention, and a road-map for how to recover from the worst case scenario. Hope is not a strategy. And BCP’s are for those that can’t afford the downtime.