I think librarian versus library might be a false dichotomy, as a very good librarian might declare that she will be found in one particular library, where she stores the actual books, rather than merely making recommendations.
The job description of a librarian probably splits into 3 areas: - Incoming: catalogize, archive, quality check, fine - Outgoing: filter, reference, recommend, make lists, order, rate limit - Async: reorganize, refresh, order, archive Am I missing some?