Commercial and military pilots spend hours upon hours training in simulators to handle failure scenarios. Look at all the failure contingency training NASA puts astronauts through. Yet here in the US, any idiot who can pass an eye test and answer a few basic questions about traffic laws can get a license to operate a motor vehicle.
How many drivers will instinctively reach for the parking brake if the brake pedal fails? How may will reach for neutral if the accelerator sticks? How many have even the vaguest notion how to handle a skid or a blow out? How many have their vehicle fully inspected at least annually?
Bottom line is, stuff breaks. Maybe it's defective by design, maybe it wears out, maybe it has to deal with a combination of events no one ever predicted. If there are things you could do to prepare for these contingencies but you chose not to, who is really responsible for the results?