An experienced writer revises. Some days you hit your stride and get lost in the flow of paragraphs and words. But most days, even for the most experienced writers, it just ain't like this. Some days I would rather do anything than write, including clean out the refrigerator and assign grades to student essays. It's the act of grading that I find onerous and loathsome.
Writing is work.
One of the members of my committee remarked he wished computers were cheaper because when he writes he almost always wants to throw one through a window. Writing is really hard work. However, writing doesn't have to be isolating work. Writing is a social process that involves readers. Writers in search of readers can find them in the Writing Center.