Well, the lock might have just looked wimpy because of the proportions of the photograph.

Actually, from what I could gather, the only photos of the lock that made it look wimpy were ones of the inside of the casing. Sure, if that mechanism were exposed to the outside world, a simple application of harsh language would open it. But a properly-designed lock mechanism, if it's enclosed within the locked space, doesn't have to be industrial-strength to prevent entry.

The only goal of any lock is to make it more of a hassle to open than breaking into the locked object by brute force. If this container's lock succeeds in this goal, it doesn't need to be any stronger than it is.