Lets just say this: Human is not the same as Homo sapiens. There are many members of our species that I would not classify as human beings - primarily for their lack of humanity.
Members of Homo sapiens are persons (biological into legal) and under American terminology, natural persons.
It is not sufficient for two organism types to be able to breed to be the same species, only that they have viable offspring. A mule is sterile, as is a liger.
These "hobbits" and Neanderthals, if alive today, would almost certainly be considered persons under the law. They would probably be viewed as human, but they would not be considered Homo Sapiens.
Technical and precise terms are required. Generalized words, like human, cannot be precise. Use the right tool for the job. Someone with far more brains and artistic skill could probably produce a Venn diagram highlighting this discussion