>>13357849A goldfish might jump out of the bowl once or twice by accident, but a human will always feed it, observe it, and drop things in.
Similarly, multiverse is just the goldfish (scientists) becoming aware of what is outside of the water bowl and how to "safely" jump out of it. Wizards were merely able to coax the things outside of the universe to throw them a bone once in a while by performing a backflip through a loop, so to speak.