Why do we keep arguing if taking massive blows to the body, head and numerous whiplashes leads to brain health problems? Isn't that obvious? There is nothing i

Why do we keep arguing if taking massive blows to the body, head and numerous whiplashes leads to brain health problems? Isn't that obvious? There is nothing in the head to absorb the energy of a sudden deceleration, but the brain. So all of the energy goes there.