Well, because they branch off theoretically like soap bubbles with an initial collapsing wormhole. This is similar to the idea that black holes might be linked to either other areas of the universe or other universes. But the entire idea of one versus more than one is not entirely fleshed out. Humans think about everything and in general, humans succeed in pretty much all that they can conceptualize. Now what this implies if there are multiple universes is uncertain because infinity is not capable of being understood without the aide of mathematical limits as per calculus.
Are you a new human or just an offshoot of two other people’s genetic material? Certainly, you are a new human. But what about germs or yeasts or viruses? I believe the largest organisms on earth are yeast formations.
No one has the answers to your questions yet even in terms of science so no we cannot determine where Goddess “resided” before She created the universe. It’s okay. We have all been there but I expect you will soon arrive to the conclusion that these questions are largely devoid of significance because you are linking two ideas that are not necessarily logically connected, i.e., the establishment of a universe with the establishment of a “divinity” powerful enough to affect humans.
Many of the “logic” questions in the Bible melt away once one conceptualizes a Goddess who did not create the universe but who still exists within it; Marvel and DC both have characters similar to this; some simply watch but others do indeed manipulate the universe for their purposes and engage in world building.
The evangelical interpretations of Revelation make more sense if Satan actually has a decent chance of winnning; if She does not have a decent chance of defeating Michael and his celestial army, then what’s the point? Is She just stupid or something?
And remember, the Bible seems to indicate that Yahweh was one of a whole host of divinities. How do you get from Yahweh being a chief god to existing before the universe or even concurrently with the universe. You need to remember that (apparently) you worship Yahweh, a Canaanite tribal god reputed to have a fierce anger with, with an equally powerful consort. So where do you even get the idea that the Divinity was anywhere before creation of the universe and even then, why do you think that it was Yahweh and not El who created the universe, not to mention Asherah?
You will see why so many intellectuals with fundamentalist upbringings fall back on the idea of the Mystery precisely because the questions you are bringing up are not capable of being answered one. Two, there’s little in the Bible that indicates that Goddess created the universe, as opposed to the local heavens, and three, there’s no creator Goddess mentioned, only a possible creator god known as El or Elohim.
The O.T. makes clear that there were lesser and greater divinities believed in by the Hebrews and Canaanites. Why don’t you believe in these entities which are mentioned all throughout the O.T.? When did they all cease to exist?