“Lock picking is the practice of unlocking a lock by manipulating the components of the lock device without the original key.” – Wikipedia
As the technology of locks and security advances, so does Locksmithing and Lock-Picking. A Locksmith needs to know how to handle a modern lock, but also an old lock, as those always exist in some places.
The main work of a Locksmith, besides copying keys and day to day work, is finding a way to manipulate a lock to open without it’s key, replace the lock, or even break the lock and open the door.
fortunately there are modern tools that help Locksmiths with their profession, some of the are quite automatic, and some still require an amount of skill to manipulate.