Though writer’s block can cause plenty of frustration and anxiety, that's probably not the greatest fear that writers have. I'd probably include writer's block in the list of minor fears that writers have, along with other common fears like "What if I don't win _____ writing contest?" or "What if my writing gets rejected by _____ website or _____ magazine?" The greatest fear of writers is more serious than a bad case of writer's block—our plans and our purpose are at the core of this fear.