If there truly are an infinite number of universes with an equally infinite number of possible timelines, that means that every piece of literature and film, every television drama or comedy, every character, every plot line, is playing out—or has at some point played out—in reality.
Star Wars, Lord of the Rings, The Hobbit, the entire MARVEL universe, DUNE, Harry Potter, all the works of Shakespeare…for chrissake, Bewitched…all are real.
In addition, in some alternate Universe, John F. Kennedy served out his Presidency, and likewise Hillary Clinton is in the White House and Donald Trump is cleaning toilets.
Just because we don't have the privilege of living in those Universes, doesn't mean they don't exist.
Unfortunately there are also Universes where Germany won World War 2—a la Man in the High Castle.
Enjoy the weekend.