He made the point in one amazing talk (that included references to centaurs and American exceptionalism and possibly ancient sumerian) that we've long used locks not for security, but as a social symbol of security.
Anyone can just put a cinder block through your window and steal your car. The barrier isn't technological, it's social. Locks are a great defense against the kid or confused person who is wandering around and forgets that we have social mores against making off with thousands of dollars of other people's property on a whim. They are not designed to defend against dedicated thieves.
We defend against dedicated theives by hiring detectives and prosecutors and making it in general more hazardous as a profession than other professions that one might take up. We defend against theft by just generally making it more lucrative to apply the same amount of ingenuity and dedication to other endeavors, like giving amazing talks about perfect security and American centaurs.
I'm probably butchering or overextending his point though, would love for the man himself to weigh in.