The chain always breaks by the weakest link. Considering that you can very easily open the zipper with a ballpoint pen (https://www.youtube.com/watch?v=wpIJVWXs

The chain always breaks by the weakest link. Considering that you can very easily open the zipper with a ballpoint pen (https://www.youtube.com/watch?v=wpIJVWXsBBI https://www.youtube.com/watch?v=wpIJVWXsBBI), and close it again as if it was never open, that the secret of the lock was revealed is irrelevant.