Because unless they have been outright lying in all of their specs, the entire body is made up of the same thick stainless steel that they have shown to be literally bulletproof.

It’s 4x as thick as current sheet metal used in other vehicles, and twice as thick as the steel bumpers used in old cars that didn’t have crumple zones.

That combined with the fact that they have stated that all of the strength and rigidity for the truck comes from the exoskeleton, that would preclude being able to crumple.

They have not made safety a priority in anything on this monstrosity. The windows are are all laminated and shatterproof, meaning you can’t break them to escape if there’s a fire or you end up underwater and the body is bulletproof meaning that it can’t be torn open with the jaws of life if you need to be extracted.

It’s a giant metal coffin.