Seatbelts are not adversarial. A better seatbelt does not encourage other drivers to crash their cars into you even harder or anything like that, it's people versus nature.
Security systems are in a permanent arms race, people versus people. You could have a more expensive lock that requires a more expensive device to defeat, but this makes your car more expensive to make, so it has a higher price, so it becomes a more valuable target, and so on.