think about car designs... in a traditional car structure, there are two chassis frame rails, that bear the weight and transfer the weight to the wheels. in 60-70's, there was an oil crisis. probably started in japan, to reduce the fuel cost, they removed the frame rails so to reduce the total weight. they designed what is called today "unibody". people were excited about the fuel economy of japanese cars, even today.
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remember, luxury cars like mb s series, cadilac, lincoln, lexus lx460, and all tesla cars are still using frame rails.
in normal driving conditions, the unibody will do its job. but when in an accident like head-on crash, the unibody will crumple like a noodle, the driver and passengers have no chance of survival. on the other hand, cars with frame rails will protect you. i saw a video recently a tesla strayed 90 deg onto a solid fork divider on a highway with speed at 70 miles, the car flipped up and landed face down, but the driver miraculously walked out of the car.
back to the topic of building, only after a life or death test, people will realize - never cut corners.
