Well AFAIK, each lock is unique, and while it's easy to pick each individual lock, it's harder to guess or derive from a few of those locks the master key that'll actually open them all.
I'd say what this "leak" really did was (a) show the world that real security is hard to think about, and (b) make it easier for normal folks who don't know about how locks work to impress their friends with their ninja secret agent tools.
Really, this is all just a parable for the big fight over encryption. Do you really want to trust a government agency with any kind of control over how we lock down our stuff? Newp, nope, and noooope.
There's a small number of TSA approved locks that don't use the three digit combo. Those are a bit tougher to crack.