Relevance. Relative. What is our significance to the rest of the universe? I really have no idea. To say something has importance is to say that there is something that is capable of establishing importance. I.e., a consciousness. There is no evidence that the universe in conscious. Indeed, there is almost no evidence of any other consciousness in the universe other than our own.
Inference is not evidence. We can say we exist and we are conscious, therefore the same processes that brought us to awareness should have happened elsewhere in the universe. But that hypothesis is just a guess. There’s no evidence so far.
Further, there is no evidence of other consciousness on our planet. Not in any of the other animals we know of. Of course, that depends on how one defines consciousness—something that is, so far, very difficult to define in a way we can test.
My own personal definition is that consciousness is attributed to others we can communicate complex ideas with. This bothers some people because it says that people without sufficient mental capacity to communicate, like babies, are not conscious. This idea seems inhumane to some. But for me, it’s just a definition. It is sort of testable. If you want to define consciousness in some other way, please do.
So far as I know, there is no evidence to suggest any being capable of communicating complex ideas with us anywhere else in the universe or, indeed, on our planet. It’s just us humans.
Our beliefs are significant to us, but there is no one else, so far, they could be significant to.
You suggest that having religious ideas is somehow significant. I ask what is your evidence for this? Personally, I think religion is a sign of poor thinking. It is emotional, which is fine. But it does not count as scientific thought. People mistake emotion for thought, and suddenly we can’t communicate. Ergo, it not evidence for consciousness, since religion gets in the way of communication. So I’d have to say your hypothesis is wrong. It reflects a big misunderstanding of how the universe works. It makes the classic anthropocentric error.
Religion is about humans. It is not about science and knowledge. Please don’t use it to try to understand the universe. That’s not what it is for. God is for comfort. God is a coping technique. Religions are about community. They bring people together. But they do it intuitively, not with knowledge. And ultimately, they separate people.
We are at a point where we can no longer afford the separation that religions bring to humanity. They are creating too much war and strife. You could argue that war would happen anyway, but I don’t think it would be as hard to settle if religions held less sway over people. Religions have served well in the past, but they need to change now, or they will destroy people. Perhaps they are changing.
But the major change needed is understanding that religions aren’t objective, and they aren’t science. They are about people and only about people. They need to stop trying to influence people with irrelevant ideas about the nature of the universe. One of the irrelevant ideas is this notion that there is a creator with personality like a human being who actually cares about humans more than anything else. That is a wishful thought, and is important to humans, but it has nothing to do with actual knowledge of the universe.