I’m gonna go ahead and rant real quick. I’m a fanfiction author, and I’m constantly looking for ideas I like. A lot of those ideas come from prompts, or tumblr posts, or other fandoms, or existing tropes.
Sometimes, fics already exist in those tropes.
So here’s my apparently “unpopular” opinion: I like reading fics of the same trope. If there’s a fic where they’re famous actors and they fall in love that I enjoy, I want four more slightly different ones. If I’m writing a fic where one is catfishing, I want to read the trope in at least four other fics like???
I like to see other authors’ take and style on common tropes. Just because one fic in a trope exists doesn’t mean the trope is off limits for the fandom. Far from it - take a chance with that trope. If you’re worried you’re too similar, mark it inspired by. You’re not going to copy someone exactly, and you could have an interesting spin on it. I want that spin to exist.
If two fics of the same trope can’t exist, I might as well delete over half my fics, including some of my most popular. It’s discouraging to hear people drop ideas because something like it exists - or even maybe exists.
tldr; more than one fic can exist within a trope or prompt in a fandom and be good fics. Please write whatever you want, even if something similar exists. Someone (like me) will read them all and enjoy them all.