We aren't suggesting that mental instability or unhappiness makes one a better poet, or a poet at all; and contrary to the romantic notion of the artist suffering for his or her work, we think these writers achieved brilliance in spite of their suffering, not because of it.
There are very few professions in which people just sit down and think hard for five or six hours a day all by themselves. Of course it's why you want to become a writer - because you have the liberty to do that, but once you have the liberty you also have the obligation to do it.
Writing is hard work, and if anything's true about the process, it's that fact that a good story is hard to find and even trickier to get on paper. What's less romantic than staring alone at a blank screen? And edgy? I've changed the cat little because I didn't know what my characters were going to say next.