It applies to poetry, too.
“We are American writers, absorbing the American experience. We must absorb its heat, the recklessness and ruthlessness, the grotesqueries and cruelties. We must reflect the sprawl and smallness of America, its greedy optimism and dangerous sentimentality. And we must write with a pen—in Mark Twain’s phrase—warmed up in hell. We might have something then, worthy, necessary; a real literature instead of the Botox escapist lit told in the shiny prolix comedic style that has come to define us.” – from the Paris Review Joy Williams, The Art of Fiction No. 223