Nothing is original, but that’s not necessarily a bad thing.
Any story can be boiled down to about a sentence. If you condense the stories enough, pretty soon they all sound the same — to say nothing of all the retellings of fairy tales and myths. How many times has Cinderella lost her slipper?
But just because two stories have the same basic plot doesn’t mean they can’t both be enjoyed. And it’s not so much what the story is as how you execute it that matters. And because every storyteller is unique (“yes! we are all individuals!”), no two stories are going to end up being told the same way.
Take, for example, Cinderella. Specifically, the 2015 Disney live-action remake, Just Ella by Margaret Peterson Haddix, and Ella Enchanted by Gail Carson Levine. They all have the same plot bones, but they end up being three very different stories.
Just Ella has Ella being her own fairy godmother. In Ella Enchanted, the fairy godmother is a hindrance. The 2015 movie features a helpful fairy godmother. JE has a prince who’s callous and didn’t care about getting to know Ella, just marrying the prettiest woman at the ball; EE has a prince who knew Ella for years beforehand, and the ball itself was just a traditional coming-of-age thing; the 2015 movie shows a brief acquaintance between Ella and the prince before she inspires him to open invitations to every eligible maiden. Without going into further spoilers for people who haven’t read the two books, you can already tell that those are going to be very different from the Disney retelling. So you don’t have to be completely original in order to tell a dang good story.
Not being original doesn’t mean plagiarism, of course. You can’t snag plot points and characterization, down to the dialogue, and dress it up with different names and pretend you did everything yourself, without at least one person calling it what it is: stealing. There’s a particular phrase that I absolutely love, but that I can’t use in my fiction because according to Google, Pratchett is the only writer to have written that phrase. Yes, I’m going to err on the side of caution and not use it. I love the man’s writing; I’m not going to disrespect him by stealing his exact words. Paraphrasing, or finding another dang literary technique, is the way to go.
Doesn’t mean we can’t be influenced by other people’s writing, though. And seeing, not an exact replica, but a shadow or a hint of someone else’s style is a good thing. We none of us live in a vacuum, and to try to strip our influences away from what we create is to leave a blank canvas, and none of that absurdist stuff either, but something dull and boring. Frankly, I’d rather that my work reminded the reader of someone else, than to not be read at all. “That reminds me of __” is a compliment. That means I’ve done something right.