That would be problematic for a lot of Kaldorei fans I suspect, as that means that Elune is also Mu’sha, which fits thematically, as that is what the Tauren call the Moon, and Mu’sha is female, but it does then raise the bugbear, given that An’she and Mu’sha are the eyes of the Earth Mother, that the Earth Mother is the progenitor of Elune, and therefore a more powerful (or at least older) deity.
Now this -wouldn’t- be a problem normally, if we took the hypothesis (and it -is- a hypothesis, not lore fact) that ‘The Earth Mother’ is Tauren superstition about what we know now in Lore, that Azeroth is herself a Titan awaiting her birth. It all hangs. The Earth Mother -is- literally the Planet, An’she and Mu’sha/Elune would therefore be her children. So far so good. Contentious, but it thematically works.
However. We also know that Elune is not exclusively worshipped on Azeroth alone, but on at least one other planet, Fyzandi. So it kinda blows that idea out of the water.
I think it is one of those things like when Velen said Elune was a Naaru, and Tyrande just went “No she ain’t, shut up”.
Plus the entire book is folk tales. No more or less real than Robin Hood, or King Arthur, Nasreddin or Baba Yaga. It isn’t -lore- because it isn’t even presented to us as lore, but as ephemeral tales with no actual proof.
It is actually pretty groovy in a setting where we know that things like Gods and Loa actually -do- exist, that there are some things that are ingrained in the conscience of Azeroth’s People, that might simply be entirely made up. Everyone knows what King Kong was, but he was never real. Likewise Godzilla, or Wolverine, Superman, Magneto. They’re just modern day myths and legends, which -we- know aren’t real, but hundreds of years from now, will there be people who were going “Well, there is all this folklore about Superman, so I guess he must have been a real person” the way we do about Robin Hood.