There’s been an effort to minimize the damage at very low speed (under 5MPH), but it’s harder to optimize for fender benders than you might think. People tend to break before collision so crumple zones are optimized for lower than highway but still deadly speeds ~40 MPH.

New car buyers also have insurance so they rarely care much about collision repair costs. The fact fender benders don’t total the car is just about the only metric car buyers care about.