But it's still Fiction. Nothing's supposed to be believable though, right? I mean, look at all the crazy stories on the internet. They're all fiction, nothing you wouldn't believe to be making sense, but still fantastic.
By believable, I don't mean whether or not you know something is fact or fiction. When I said "believable", I meant that the story immerses us so much into the story, it's as if not only have we been transported into the world in question, we're witnessing the story foretold by the piece of fiction first-hand.
It's for this reason why Pokémon is so popular, why someone went through the crazy motion of actually renaming themselves to "Optimus Prime", why people love pretending to be ponies (looks at Aurora Dash/Pteriforever), etc. It's the entire reason fandoms exist in the first place.
By believable, I don't mean the creation of actual life because that's impossible. Rather, when I said "believable", I mean creating a very convincing illusion of life, the very phenomenon I've explained within this post. This isn't something one can merely dismiss. Without a convincing illusion of life, we can't get into the fiction, and without being able to get into fiction, we wouldn't be able to enjoy them.