Traditional locks are more like suggestions, and have a well known attack called "lockpicking", that is easy to learn. I doubt smart locks will be less secure than that.
Still leaves concern for DOS and privacy attacks.
Still leaves concern for DOS and privacy attacks.
No lock is totally secure, but at least a dumb lock requires physical presence to defeat.
The real problem with all this network connected stuff isn't even the new failure modes per se... it's the correlated nature of the new failure modes. (You know you're a Real Systems Engineer if something inside of you just screamed in terror.)