Lol OK... My node has a built-in wallet. So, I can login to the web panel and send and receive from it. But I can also use the NWC string to connect it to Alby Go or Zeus. These front-end applications bring my node's wallet functionality out of the web panel and into a nice wallet app that I can more easily access and use to send and receive.
My backup wallet with lnwallet.app is accessible only through NWC. You must connect it to a front-end like Alby Go or Zeus in order to use it to send and receive. This is basically the use case for this functionality