The process of book writing is different for different people.
I planned what I'd write for quite a while before beginning. I had a lot of fun writing. I was laughing in some places and crying in others, and that carried on into editing. I found editing to be just as much fun, and I read my novel start to finish about 30 times during editing and beta reader feedback.
Other people have a story idea and just start writing, going wherever the story leads them, but they loathe editing. I can see where editing could be a pain when you're no longer in that freewheeling creative mode.
It seems to me that this is why some people like traditional publishing better. They do the editing for you. If you hate editing, this would be a real boon.
People who do little planning, just run with a story idea, can put out multiple books per year if all they do is write. No planning, no editing.
It's amazing to me how differently creativity manifests itself for different people.