That is an interesting point, I wonder when if ever one would be issued a JEPP ODP from the back of the plate in lieu of a SID or Radar vectors at a tower operating airport. Maybe ATC does have the ability to issue a clearance like "fly the published ODP" But I have never heard of such a clearance. I make distiction between an airport diagram ODP and an actual dedicated SID.
In giving this further though I suppose that there might be a towered airport with mountainous terrain but is not served by a SID especially in other countries. This would definitely be a time where you would be cleared for takeoff but not given a SID or a radar vector but rather be expected to comply with the ODP on the back of the airport diagram. I havent ever run into this but now that I think of it, I bet it is fairly common in places like South America. Food for thought I guess.