I think most of them are probably caused by deferred maintenance, which may either be the result of the owner making poor decisions, or a circumstance forced on them by poverty. In cases where the car is defective as manufactured, I have no sympathy for the company that made it. If that happens, I want the car company to pay for it. Which I believe generally happens. Car airbags blow up in your face because of a detective design? The car company has to pay to fix that. So your question has a false premise; we don't ignore deaths caused by faulty manufacturing. Usually anyway, some car companies seem to get away with more than others..
if a taxi driver crashes, youve got a bad taxi driver somewhere you will probably never interact with. If a self-driving car crashes, you've got possibly hundred of thousands of potential accidents waiting to happen from the same "bad driver"
the regular car accident conversations have all been had. what else is there to say?