There are many reasons folks don’t write. Lack of talent isn’t one of them. Competing is.
Since writing is not a competitive sport, it doesn’t help to compete, but it is a natural response. If someone, say, Margaret Mitchell, writes a popular book (Gone with the Wind) it’s natural to think “Oh, boy, I’m gonna write a BETTER book about the Civil War and the conflicts that drive us to love, hate and persevere….or, worse… “Glory be, I could never write anything half as good as that so why try?”
This may be delusional or egotistic or defeatist but it also is competitive and pretty much spoils the act and joy and outcome of writing.
So, here’s a tip. Write about war, or children who are wizards, or pilots who have the right stuff if you wish. Despite critics and the odd little world of publishing, writing isn’t a contest and there are no judges. There are only readers. From what I’ve seen, they are a pretty fair bunch.