Why are writers such exceptional procrastinators?

Pensavo fosse solo un mio problema, invece sembra che procrastinare sia un vizio assai comune. 
"Over the years, I developed a theory about why writers are such procrastinators: We were too good in English class. This sounds crazy, but hear me out. Most writers were the kids who easily, almost automatically, got A's in English class. ... If you’ve spent most of your life cruising ahead on natural ability, doing what came easily and quickly, every word you write becomes a test of just how much ability you have, every article a referendum on how good a writer you are. As long as you have not written that article, that speech, that novel, it could still be good. Before you take to the keys, you are Proust and Oscar Wilde and George Orwell all rolled up into one delicious package. By the time you’re finished, you’re more like one of those 1940’s pulp hacks who strung hundred-page paragraphs together with semicolons because it was too much effort to figure out where the sentence should end. ..." Megan Mcardle, theatlantic.