I'm an atheist; speaking only for myself I'd rather just always deal with the truth. But I realize that a pragmatist may find the truth isn't always useful. So if you need to construct a Demon and name it alcohol in order to fight your battle, then do it! If you're agnostic/uncertain about religion but find the idea of a higher power to help you through recover, use it. That's all I mean by my statement.
I guess an "empty truth" could be the idea that death is the end; we just go out like a burnt out light bulb and cease to be. That may or may not be the truth, and it may be an empty one if you gain no benefit from it.