The information point that is most relevant is the bone sutures of the skulls. If they match typical humans, the external methods of deformation make sense. If the suturing pattern radically differs (my understanding), how would external deformation explain the difference in the number of bone components that make up the skull?
Or Trump goes easy and lets Biden not totally collapse, sticking the Dems with him. Give him enough of a lifeline to get him through the Dem convention, then drop the hammer.