Generally speaking it rests on "god" or "gods" being beyond our comprehension. The whole "biblically accurate angel" thing isn't just a meme, to some degree it's also best effort attempts at making images of something described in a way that most people nowadays would consider borderline lovecraftian.

So it kinda follows that if those things are supposed to be the approachable messengers, than anything remotely human-like can't map well to the "form" of the god over them.

Also, biblically there's already arguments for time not being a thing for the Christian god.

If omniscience is truly what it says on the tin, there's no reason that a being with it couldn't care about what every creature in the universe is doing with their respective reproductive bits, as well as caring about every single more important thing everywhere, simultaneously. The whole point of omni-* in terms of gods is to be limitless.

I genuinely don't get how you could possibly think that's somehow mutually exclusive with believing in space/the universe. The universe is so incomprehensibly big compared to what any of us will get to directly experience in our lifetime. If anything I would think it would make it easier to believe in a being similarly incomprehensibly outside the scope of human existence, experience, and understanding. Like you're perfectly fine with the cosmic infinities, but you can't bring yourself to imagine some being one more level hierarchally above that?

You think that someone could look at all the amazing and wildly weird shit in this world, think that some god being made it all happen, but then also think "yeah, it definitely stopped there, no more"?

Like, I'm sure there's plenty of people that do. There absolutely were over the course of history. But to me it just seems kind of like a huge conceptual schism to believe in some sort of god being and not believe in space/the universe/etc.