No writer can ever produce a flawless manuscript alone. Writers are simply too close to the story to know if everything has been successfully translated onto the page. That’s why writers work with reader groups, critique partners, writer’s circles, or professional editors.
Draft one of a manuscript is for you. In this draft, you get to tell your story to yourself. You can write as much as you want, go off on tangents or side quests, or infodump and worldbuild to your heart’s content.
Cutting through the noise as a writer is hard. Not only are short story contests a great way to get eyes on your work, winning a short story competition can provide a much needed sense of validation, and it never hurts to make money doing what you love.