If that was true then all cars should have ignition interlock devices, because it's easy for a manufacturer to foresee a user driving drunk. But they don't, an

If that was true then all cars should have ignition interlock devices, because it's easy for a manufacturer to foresee a user driving drunk. But they don't, and I'm not sure if there have been many successful cases of suing car manufacturers because their cars let people drive drunk(?)