That seems to be the question asked by reviewers, readers, authors and other assorted fans. To me, that's a moot question. Of course it has a place. But Doctor Who always seemed to serve multiple purposes for me. The first was to entertain and the second was to inspire.
Campaign succeeds at both.
Campaign is an effort of the mind. It challenges the reader to think. To think about life and death and purpose. To reflect upon loss and limitation. To question the very nature of existence.