Many worlds is also my preferred interpretation, but it really puts the weirdness of super position into perspective. If we really are splitting entire universe

Many worlds is also my preferred interpretation, but it really puts the weirdness of super position into perspective. If we really are splitting entire universes all willy-nilly like, maybe some of the other possibilities aren't so weird in comparison. Is causality-breaking FTL travel really more improbable than the universe splitting into infinite pieces just from the act of observing particles?