The best locks offer is that you have to plan a break-in in advance; i.e., you have to have your lockpicking tools with you. That said, you can pick master locks with a paperclip; I've done it. So it's not much of a barrier.

That said, just because people have low-security locks on their house doesn't mean that better options aren't available. I have Medeco locks. They are harder to pick than what you get at the hardware store. So far, no break-ins from lockpickers! Also, I'll sell you a rock that keeps tigers away.