The job of a home lock is not to be completely impervious to picking (or other bypass methods like shimming or drilling). It is to make getting in by defeating

The job of a home lock is not to be completely impervious to picking (or other bypass methods like shimming or drilling). It is to make getting in by defeating the lock harder than getting in by breaking the door or breaking a window to the kind of bad guy that most homeowners in the lock's target market will encounter. Putting too high a security lock on your house doesn't really reduce your break in rate and it can makes it more expensive if you ever lose your keys if the lock is too hard for the locksmith you call to easily pick. The locksmith may have to drill it, and then you need to replace the lock. If it is a high enough security lock that the locksmith can't get passed it you'll end up breaking a window anyway, and you probably have to pay for at least 1/2 hour of the locksmith's hourly rate for them to have come out to tell you to break a window.