I think you have the right idea for what low-hanging fruit is
supposed to be.
When Going Rogue hit, we had to flip all badges to be available to both heroes and villains, and that is why you're seeing the villain exploration badges. At some point, we'll need to reassess the Low-Hanging Fruit feature and how it works. It's one of a long, long list of things that need to be updated.
In the mean time, it's probably not going to be nearly as useful as one might home.
