If you look at the various ways people have tried to interpret thermodynamics and the observation that our local universe started in a state of low entropy (not

If you look at the various ways people have tried to interpret thermodynamics and the observation that our local universe started in a state of low entropy (not exactly spacetime, I know, but it's related to the problem), then you'll see that a variation of your question has been very thoroughly considered already. Namely, the possibility of the low-entropy start of our observable universe being merely a local statistical fluke on a cosmic scale across infinite time and space. The problem is that this often leads to weird paradoxes, like the Boltzmann brain universe[0], and from what I understand it's still not entirely clear if that's just a sign we're doing statistics wrong or if there's something missing in the theory of cosmology. Personally, I'm wondering if the issue isn't that these theories are assuming randomness, but in reality the next "state" of the universe depends on the previous state, so it's actually pseudo-random. But that sounds like too obvious an explanation so that has probably been ruled out somehow. Anyway, just to be explicit about it again: what I'm talking about relates to thermodynamics and entropy. You're question is about spacetime and the laws of physics, which is something else. [0] https://en.wikipedia.org/wiki/Boltzmann_brain https://en.wikipedia.org/wiki/Boltzmann_brain