The same Kias & Hyundais were sold in South Korea, but their auto theft rate is 60x lower than the US.[1] Car theft rates are mostly determined by how effectively car thieves are caught & punished, not by how secure the car is.
1. 4.7 per 100k people per year vs 288.5: https://en.wikipedia.org/wiki/Motor_vehicle_theft#Motor_vehi...
Or because america doesn't regulate immobilisers like most other countries and has a race to the bottom mba mindset to save a few pennies vs the public good.