When it comes to routing, knowing how to get from point A to point B in the most efficient manner isn't exactly the only use-case. When it comes to modern applications or use-cases, a lot more can be and should be accomplished.
Let's take the scenario of a package delivery service. When it comes to a delivery driver, they fill up their truck at the warehouse and have to navigate to every address that exists on a package in their truck before returning the truck to the warehouse. The driver can't just pick random packages from the truck and deliver them randomly because that would be very inefficient. Instead, each delivery should be carefully planned to optimize how many packages can be delivered and the quickest.