Why is it that the world rejects an engineering mindset when it comes to cars, despite them being an engineered product (and service)?

To illustrate my point, let’s treat the network of all motorways globally as an engineer-provided service/product to the wider public. Which it is; but cars are also designed, sold, and owned by businessmen, unlikely to apply the “engineering philosophy.”

• So suppose engineers notice this tidbit, that black cars are salvaged more, suggesting more accidents.
• Road networks as a unified system are made less efficient when car crashes occur, actually coming to a temporary delivery standstill around the area of accident
• Any inefficiency can be designed away; either with a different system or streamlining the system. (A different system is good if you reach a dead end in further development of existing system or realise it would be, by default, better in some holistic way)
• in this case, a train network would be replacing with a different system, but simply removing black cars from the roads would be streamlining efficiency by reducing the number of crashes.

This is simply the logical way to approach an important, fatality inducing machine like the highway network.

I could theorise that business leaders sell black cars because it allows for

• increased insurance premiums, and in turn increased sales price
• satisfaction of increased demand for “executive-looking” cars
• increased demand for repairs due to the increased accidents

But who knows.