Even if a smart lock used ROT13 encryption, the easiest way to defeat it is still probably a mechanical attack. The state of mechanical security is a whole new level of weak.
Keys are a pain in the ass to replace, and there is literally a set of 3 windows within reach in the porch that could be opened trivially.
The biggest feature of any lock is breaking into a locked house is a felony for the perp.
I'm not sure what the moral is. Your comment reminded me of this story.
Leaves guests bewildered when they come to stay.
Long time ago I had to upgrade my whole bloody alarm system of my old house because I wanted to insure a watch.
So the Hulk just knocked a hole in his stone castle wall next to the door, and walked into the lab.