Does it seem easier? We have no indication that higher dimensions are a place you could "travel" to. This is the kind of ad-hoc hypothesis Occam cautioned agai

Does it seem easier? We have no indication that higher dimensions are a place you could "travel" to. This is the kind of ad-hoc hypothesis Occam cautioned against - multiplying entities unnecessarily. "UFOs are spycraft, hoaxes, and surprising atmospheric phenomena" is a perfectly serviceable alternative to the hypothesis "UFOs are alien spacecraft." Why are we introducing a new entity (extradimenional travel) which we have no other evidence for, when we don't need to?