Why would existence take the form of an infinite expanding and collapsing universe
If time and existence are infinite, then any possible arrangement of matter (including your exact self) could repeat endlessly. It's like rolling dice if you roll them infinitely, every possible result must happen an infinite number of times.
If some deeper reality is eternal, then there's no conscious choice behind it—no purpose, no intention. It simply follows whatever fundamental laws govern existence. A cyclic universe, for example, could just be the inevitable result of how physics operates at the deepest level.
The universe doesn't show signs of having been designed with intention it just follows physical laws. Stars form, planets appear, life emerges, but none of it seems planned. It's just cause and effect, one thing leading to another in a chain of natural processes.
If no thought went into creation, then existence is just a brute fact . That makes everything, including our own lives, a kind of accident, not part of some grand plan.