"No, the truth of the matter is in your first paragraph. Designing and building a car is not easy."
Maybe to dumb people it's not easy. to the rest of us... yes it really is easy. It's a well defined and massively repeated process. An engine is trivial, a car suspension is trivial. a whole car is trivial.
When you add shit to it for the sake of adding shit.. That is when it get's complex. No I dont need a computer on my brakes. a computer to the side of my brakes looking for slipping and trigger a modulation piston to give me anti-lock? Sure. but if the computer fails, I will have brakes.
Idiot designers want to put the computer in the middle so all braking is done by the computer. When it fails you have no brakes.