Why do cars and vehicle manufacturers not invent safer materials for their casings and bodies to prevent incidents on the road?

Question

Why do cars and vehicle manufacturers not invent safer materials for their casings and bodies to prevent incidents on the road?

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Answer 1

It’s never the case that vehicles (or anything really) can’t be invented or implemented, it is the fact that things like this will always be cost inhibitive. R&D and manufacturing costs will be passed on to consumers. Near-perfect, extremely safe cars CAN be done, but the average person would never be able to afford it. It takes decades for new materials and technologies to trickle down to consumer levels of affordability.