The compelling thing about this split-universe theory, btw, (I think it’s called many-worlds theory officially), is that it’s unexplainable to science why quantum events are random. There’s no way of knowing which direction a photon will travel, or when a radioactive nucleus will decay. Einstein was also baffled by this seemingly unaccountable randomness, claiming instead that “God does not play dice”. Scientists by their very nature prefer order and predictablity, but quantum physics itself states that events must happen at random (Heisenberg Uncertainty Principal). If a photon goes left instead of right completely at random, then can it also go right in some other universe, and still appear random in both? That at least explains what otherwise cannot be explained by present science.
I agree with you.