Tell the wife a Defender doesn't need a safety rating as they don't go fast enough. It has articulation, ground clearance, and correct gearing to climb trees. It has coil suspension to iron out the humps and bumps both on and off road. You sit high enough so you can see several cars in front as to gauge what's going on.
Japanese cars have safety rating because they go fast. They have NO articulation, NO ground clearance, and POOR gearing. They put big power motors in them so you can flog the crap out of it to get it to go anywhere off road, and drive like a car on road. They put lots of safety features in them to help people cope with all the speed on hand.
They have a mix of combating suspension so you bounce and bash over everything, and sit not much higher than a conventional car. If you lucky you might have .5 of a second to react before the 15 air bags go POOF .
They also plummet in value.

