You seem to be arguing with some point I don't make. I'm saying rights only matter in a social context. If Elon Musk launches himself to Mars and lives alone there forever as a hermit, the concept of "rights" isn't useful there.

That said, I think rooting rights in somebody's mythological figures isn't a good idea. And "natural" in this case isn't much more meaningful. It's fine rhetoric, but it's not a very strong conceptual model.