That depends. Multiple universes don't explain causation. For example if you assert that all things present in the material world you live in (right now) at some point transcended existence in thought only to a material form (the planet didn't build concrete, we did) - how does this fit through entropy in a multiverse? To assert that in a multiverse the causation is defined by tuning, the existence of a universe in contrast to that which we are currently experiencing brings no causation from one to another. To me, this implies that a 'multiverse' is likely not the case; rather - dimensionality within the universe we experience is much more likely the case for a unified cosmos, given the fine tuning.
As Tesla would say, to understand the world you have to understand frequency and vibration. Such as, matter is able to exist in multiple form with the same building blocks, thus extra dimensions would posit why this is possible across relativistic time by the observer. We're bound by our dimension and other dimensions are not.
You and I experience in 3D - but what about other organisms, perhaps they have attained an experience of our cosmos in other dimensions.