It’s the simplest explanation (in terms of Kolmogorov complexity).
Do you have proof of this? I see this stated a lot, but I don’t see how you could know this when certain aspects of MWI theory (like how you actually get the Born probabilities) are unresolved.
I’m not talking about the implications of the hypothesis, I’m pointing out the hypothesis itself is incomplete. To simplify, if you observe an electron which has a 25% chance of spin up and 75% chance of spin down, naive MWI predicts that one version of you sees spin up and one version of you sees spin down. It does not explain where the 25% or 75% numbers come from. Until we have a solution to that problem (and people are trying), you don’t have a full theory that gives predictions, so how can you estimate it’s kolmogorov complexity?
I am a physicist who works in a quantum related field, if that helps you take my objections seriously.