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> That bit about "designed to absorb impacts and avoid collisions" sounds like an excuse. Of course we all design for that.

No, we don't. Industrial design has only recently begun to take that approach. The old way is "bigger is better," and is the approach taken by, for example, school buses in the USA which have an insane safety record. I believe this year was the first time in over a decade that there was even a single on-board casualty in a US school bus.

You probably want to watch this video:

https://www.youtube.com/watch?v=fPF4fBGNK0U

Making them more crumpleable is intended to do that.