If there is an alternate universe for every possibility, then there is a universe where alternate universes don't exist. And we exist so we have to live in that universe. Therefore there are no alternate universes.

Edit: for all of you trying to prove me wrong, I know I'm wrong, it was just a shower thought Edit#2: I would like to thank anyone for the support. This was my first post here and I'm going to try to make more like it. I already have one in mind for tomorrow ;) Edit#3: I never said infinite universes, just that there are universes to represent every possibility, which would be a finite amount.(DISPROVEN DO NOT USE IN ARGUMENT) Edit#4: it is physically impossible for there to be an infinite amount of possibilities within a finite universe. Instead, there would just be a massive number of possibilities, too big to comprehend even. Much like the almost infinite amount of stars in the universe, there's a lot of them, but not enough to be infinite.(DISPROVEN DO NOT USE IN ARGUMENT) Edit#5: does it matter wether infinite universes exist? As long as one exists in a multiverse with no other universes in it. Then that universe would not have any universes.