Also, when I hear "smallest and closest" my brain immediately says "probably not a coincidence."
Instead, I think, we may see this as the nearest black hole because such small objects may be the most ubiquitous kind of black hole. If they are, then one of them is the nearest black hole to virtually everyplace, and we just don't know it yet! These are right at the limit of our ability to detect. there could be a dozen of them closer and we wouldn't have seen them yet, just because we haven't been searching for them, or haven't been *able* to search for them, until now.
Instead, I think, we may see this as the nearest black hole because such small objects may be the most ubiquitous kind of black hole. If they are, then one of them is the nearest black hole to virtually everyplace, and we just don't know it yet! These are right at the limit of our ability to detect. there could be a dozen of them closer and we wouldn't have seen them yet, just because we haven't been searching for them, or haven't been *able* to search for them, until now.