Because if you're trying to write and you have unlimited time, you can procrastinate an unlimited account, but if you have limited time, you rush to the page trying to get something down in the little bit of fragment of time that you have, and you may write a great deal that way.
“I want my testimony to stand on that point. But I would point out that Zona Research Inc. showed we have increased market share among business users, educational users, and government users over the past several months - and that's more recent than the IDC report.”
“I've earned my living in all sorts of terrible ways - as a janitor, a copy editor, a psychotherapist.”