“There is no such thing as good writing, only good rewriting.” –Louis D. Brandeis.
I don’t believe that there isn’t good writing, but much of what makes a piece of writing good is the effort put into revising and rewriting it. However, many times, people agonize over trying to say things perfectly while writing a rough draft, and they get so caught up in perfectly articulating one sentence that they lose momentum and the rest of the draft suffers for it. Remember to see the forest through the trees! Just get something written down on paper, and then revise, revise, revise.