I wondered the same thing since everything in that place was empty. It could be used as a hideout I guess. But as the manual say, if its not owned by you then, there's no guarantee that it will still be there. Something like a new DLC could reset whats in non-owned containers and make all that stuff disappear. You never know. This happened to me in fallout, used some containers through out the whole game, and downloaded DLC, and came back to find none of my stuff was in that container. Be careful if you do decided to use the shrine as your storage spot.