A question clearly giving away that someone has never written or finished a book in their entire life. Writer whether aspiring or otherwise go through a series of people who love pretending they know what it means to be a writer. Less than pleasant but well-intentioned is usually the nicest way to describe them but this post is not to completely bash this collection of people. Instead I wanted to touch on the three points usually involved in the writing process.
These are obviously based on my experiences and every writer will vary on their process but what you see in print or in online book stories has a gruelling journey that no one sees. Hopefully with a few words on this post, people (especially non-writers) can understand why it takes someone that long to write a book.