Not sure if this is directed at myself or AI. If it's directed at me, no, I'm suggesting any of the sort. Fictional writing is fictional writing and science is science.
Now, are you suggesting that we should look for genetic explanations of the Vanir and Jotuns and Aesir and their interrelations and human descendants? How about titans, nymphs and gods of Olympus? It's not scientific. It's mythic. Your terms of analysis do not apply to the situation, and would not even if Elrond and Aragorn had been actual, historic persons.