You say this because you don't actually understand what fanfiction is. Or well actually, you might say this even if you knew but I'll tell you anyway. Fanfiction is primarily a vehicle for writers to fix things that they find wrong in the story. Avenue's unexplored, deaths badly written, political or societal issues that were flubbed. There are so many things that are within that same universe. If you consider the fact that all work is derivative to some degree, why would it matter if you wanted to utilize a world that was already there? Even when people write original stories, to say that they aren't drawing inspiration from things is like proclaiming that they just popped into existence in that moment with no other preconceptions or past experiences in anything and somehow just started writing. It's silly.rorychief said:maybe I need to read the good fanfic stuff but what engages and inspires me is creativity and fanfic seems to exist for people who wish to write but don't want to invest time into being creative. I mean anyone can take two characters and put them in a room and imagine what they'd say if they have material to work from. Creating characters that people feel so connected to that they feel they could imagine their reactions outside the story they're featured in is a talent. Writing fanfiction is an exercise to bring yourself closer to realizing that talent. If you can write in an interesting, well paced way but you require preloaded templates to begin I would call that being a good technical writer, but for me the heavy lifting that makes a writer different to the average joe is creativity and the ability to build things, rather than make use of the assets someone else has built to move around the pieces and play dolls house with. Will never be as relevant, remarkable or impressive.
if your fanfiction is so good that it doesn't require the source material to have impact, and someone unfamiliar with the character histories and relationships you're sponging off can agree its a good standalone piece, then you should write your own characters. I don't know one serious writer who isn't constantly overwhelmed with ideas for characters and worlds and themes and events they wish they had the time to dedicate to but don't because the ideas come faster than they can be committed to materiality and refined. It's hard to imagine someone with passion and a real fire in their belly and something to say dedicating any time to fanfiction, it would be such a waste of time when one could be developing an idea that might otherwise never be heard. Who could bear to work within the constraints of someone else's world and characters except someone who likes or needs to have their imagination dictated to them. Fine as an exercise to build confidence or as a parody, but it will never be as legitimate as the original.
And even if you are a writer doing your own world, there are so many stories out there right now that even if yours was GOOD, there's no way of knowing if anyone would actually ever find it.