There is also the assumption that the universe is not infinite, that the universe is unexpectedly very small. Of course, while this statement assumes that it is small, it is not the size or level of the solar system, but the size that can hold thousands, tens of thousands of galaxies, but it is still limited. That is, the hypothesis that the universe is finite and exists in some geometric shape (similar to polyhedron) (the "Poincaré dodecahedron hypothesis").
According to this theory, if you keep moving forward, to the end of the universe and moving on, then you will re-enter the universe from the other side of the universe again. It's like opening the balcony door and going outside, and then maybe entering the house through the door in an instant.
If the universe is geometrically shaped and finite, in a sense, we are trapped in the universe. Humans instinctively fear being trapped.
Think a little further and we'll be in a zoo. There is a very intelligent higher being, which has created a small universe in which we are raised. The famous one about this hypothetical is Arthur C. Clarke's 2001: A Space Odyssey. In the final scene of that work, we are observed by beings beyond humans.
I don't think humans are the smartest in this vast universe. There should be a more advanced civilization. It's relatively natural to think that way. What will become of a civilization that is constantly intellectually improving? Perhaps it may eventually be possible to have the ability to artificially create the universe. In that civilization, scientists will also conduct experiments, perhaps building a universe in their own labs and looking closely. If we are only the ...... of the animals that have been testedunimaginable horror ......