Use case 1: Double check my work, especially the URL rule within a UI Element rule. I need to ensure I have wildcards in there, as it pre-populates the current URL when adding the URL and I often miss this step.
Use case 2: QA and future proofing. Provide a list of defined selectors that are part of our product mapping. Then, when our QA processes are reviewing new versions of the product, they can catch and alert if a selector no longer exists or other changes that could impact things.