Imagine you discover a lost manuscript. You read it and it has a profound effect on you. You want as many people as possible to discover it and be affected as you were.
Publishers tell you that there is no market for re-discovered literature. But a big publisher is required for the book to have the scale of distribution it deserves.
After a while you see the solution. This is a lost manuscript and nobody would know if you were to put your own name on it, market it as something brand new and get all the buzz that would come from the reviews and best seller lists.
Would you do it? Would you condemn someone who did?