Here's how it works, with me and with most writers I know (because I've asked). I've used computers for more than 25 years. I draft prose on-screen, work it over until I can't find much wrong with it, then double-space it and print it out. At that point I discover what's really there, which is ordinarily hazy, bloated, and boring. It looked pretty good on-screen, but it's crap. My first drafts on paper, after what amount to several drafts on computer, look like a battlefield.

Why would a bestselling author, capable of garnering a six-figure advance on a book, forgo the money, the media, and the mojo associated with a big publishing house?

Because it would make my book twice as expensive for you, half as profitable for me, less purposefully written, and unavailable until about two years from now. In short, the traditional publishing system is nearly dead. And publishing a book under its rules can mean the death of ideas within it, as well. Until it utterly reworks its method, gets rid of a majority of its corporate dead weight, releases its publishing houses from the conglomerates that own them, and embraces direct selling models, the publishing industry will remain rather useless to readers and writers alike.