Show me how doing that can be anything other than pointless. Go ahead and answer the OP question and let's see you produce words of value - some insight that illuminates. I'm pretty confident you can't.
Then you ought to be able to demonstrate that. Show me why you think it can be informative to invent gods and then describe the universe they might create. Go ahead and actually do it.
First, let's ask ourselves what conceptual niche our imagined "God" would be expected to fulfill. And that alone could lead to some interesting self-evaluation. I mean, if we wanted our God to stand in some sort of meta-judgment over all that is, what does that say about us? Or if we didn't, what does THAT say about us? And do we expect our God to have a purpose for having created us, each other, and 'the world'? And what might that purpose be? What would these say about us? Is our God omniscient or not? And so on. Seems to me that we could actually learn a lot about ourselves and each other by participating in this exercise of defining God for ourselves. Because "God" is mostly going to be the embodiment our unfulfilled ideals and desires. Certainly things that warrant some examination.
But you would have to stop attacking theists and theism and actually take some time to contemplate the possibility of a God, honestly, to get anything from such an exercise. And you weren't about to do that, were you. So of course you saw no value in it, since you automatically presumed that nothing involving theism ever has any value. And you just popped in to remind us all of this superior insight of yours.
That's what I'm seeing, and commenting on.