I'm sure you could achieve safety targets with a vehicle that was safe for those outside of it as well, perhaps safety for your children crossing the road should be attractive to consumers?
Sedans, hatchbacks, and wagons are those vehicles. They are slipping in sales compared to SUVs despite having better pedestrian safety. People have many priorities when buying a vehicle, and most people simply don't think they're at risk of running over their own kid, until they do.