This is what jumps out at me- the design seems to focus around the external. What I was told once (IIRC drivers ed so who knows, maybe scare mongering) was that we shouldn’t assume that even excellent external protection will take care of us, because there’s no way to sugarcoat your internal organs going from 70mph to 0 in a split second (or even more if it’s a head on and have to add the other car’s force).
