When a car uses its energy absorbing features in an accident, the occupant is decelerated at a rate that is hopefully non-lethal.  If the car bounces off or stops suddenly the occupants continue in the same direction at the same speed until they encounter something to stop them.  It is far better to have enough car around you to absorb the energy of the impact.  Even the few inches afforded by a slightly larger car with a trunk may be enough to save your life.  Smart cars are dumb.