I had a similar experience with the one volume version, and needing to work it out. Not sure if it was a good feeling entirely when I finally accessed all the "solutions" in the appendices. In Tolkien, as in real medieval history, family connections and "prosopography" more generally can actually be important for understanding why things happened the way they did.
Of course Tolkien was an academic who spent a lot of time reading medieval material in the original languages and knew how difficult it could be to come to scientific understanding of real histories. When he writes about his hobbits, his caricature of rural English people, he is fond of them, but maybe laughing at them just a bit with all their self-importance and narrow-mindedness. (Remember the hobbit heroes in the book are not typical.) His serious personal efforts went into the Silmarillion, which has no hobbits, whereas he wrote the Hobbit for his kids and was surprised how popular it became. His publishers pushed for the "sequels". I am not sure I would be happy with being called a "hobbit genealogist". :)