Why alternative realities can not be possible in the multiverse

According to the multiverse theory, anything that can happen does happen in an alternative universe. However, as I explained, each universe besides our own, is like the soap bubble; although the soap bubble might seem to form a definitive boundary through which nothing can interact, that simply isn’t true; the effects of our universe extend to all universes, to the entire multiverse. Therefore, the thought that each universe is slightly different than one another, and coming to the conclusion that every alternative to our own universe is out there, is simply nonsense in my opinion. That’s because our own universe has an influence on all other potential universes, and everything that happens in each universe is to some extent dependent on our own, and our own universe has effects on the entire multiverse. I think that that is, at least to some extent, an echo of the quantum explanation of physics. Every thought that we produce here in this universe has some kind of an influence on another universe, even though such an influence is infinitesimally small. The farther a universe is from our own, the smaller this effect probably is, but I don’t think that there’s any reason to think that there’s a magical boundary at which these effects, or influences, from each universe, can simply be prevented or stopped entirely; the laws of physics can't be isolated by an invisible wall or anything of that sort. It’s much like the speed of light; the speed of light can’t be attained with matter; speeding up a particle by adding more energy will only get it incrementally closer to the speed of light. There’s no magical force that could speed anything up to the speed of light by entirely making a boundary (or something of that nature) by which the laws of physics are isolated away from our own. An alternative reality essentially can't be realized in another universe, because such a universe is dependent on what's happening in our own universe, and in fact other universes, so there's a constant response between universes, or cause and effect which determines the fate of what goes on in universes.