Locks keep lock-picking ignorant and insufficiently motivated dishonest people honest too.

I don't think that statement makes any sense. Why do honest people need anything to keep them honest?

Probably something more like: locks marginally aid in diverting lazy / opportunistic thieves.

That should really be the takeaway from any of his videos. Anything you buy consumer-grade can be cracked instantly by a skilled locksmith or within maybe a few tens of minutes by an average thief. The number of locks that I've ever really seen him struggle to pick can probably be counted on a single hand.

Like a safe - a lock buys you time, and hopefully the thief chooses a loud method of entry that attracts attention.