So you disagree, but have never experienced this as a problem???
Well I have hit the "void" a few times with Berger Hunting VLDs. Nobody makes perfect shots all the time. Dont care how good a marksman a person thinks they are. However, the shoulder blade provides more than enough material for the Berger to begin expansion upon entry and create violent and explosive terminal damage on the vitals after penetrating 4"-5". I assure you that the animal will go down and die when you accidentally shoot just below the spine. There is not enough space for the spine and/or lungs to avoid damage when hit there. The bullet may enter in the area of the void, but it's like a bomb going off inside the chest cavity once it breaks through the shoulder blade. Even with the shot a little low below the spine, I have witnessed vitals liquified by the bullet shrapnel and shockwave.
Watch a slow-mo video of a Berger hunting VLD from a high powered magnum rifle entering ballistics gelatin. The terminal blast energy after initial penetration is impressive.