Isn't the point of a lock just to keep honest people honest? I mean you can buy the world's sturdiest, more secure lock and attach it to the world's strongest door, someone with a hammer can easily break a window. If someone is determined and willing, there really is nothing you can do to stop them from breaking into your house.
I'd even go as far to say that for burglars it's important to leave traces of a break-in so that the victim can claim insurance.