Yeah crumple zones are enforced by the bumper so when you lift a car you’re making the colliding car smash into the other above the bumper and gliding above the crumple zone if I recall the Ford pento was unfairly judged because the cars that were used to rate it’s rear end crash safety had their front ends waghted down to simulate heavy breaking however it caused the cars to not only have more weight than normal but they also ramed into the pento going under the crumple zone and directly into the gas tank so I guess you can also make a argument for lowered SUVs and trucks to be just as bad as lifted trucks and suvs