I have had an off on the track, and the helmet bore witness to the impact. It pushed the chin piece into my sternum and produces a large circular bruise on my chest (was doing 45-50mph at the time) see pic - other damage of course, but my head impacted with the ground.
Come to think of it every single accident I've had on a motorcycle in the 35 years of riding has resulted in the helmet sustaining some form of damage. Had the helmet not been there, I have no doubt that my head would have picked up some damage as a result.
Your suppostion that they don't hit the road is quite frankly rubbish.
This is not anecdotal evidence. The crash helmet he was wearing was severely damaged in the impact with the visor mechanism ripped off as well as extensive flaking of the paint around the compression point when he hit the ground, I was close behind him on the blue bike in the picture (i clocked the impact speed at 60mph), saw him bounce off the car and then hit the road head first also.
His left side connected with the the rear quarter of the car mk 1 Focus and had the car light cluster plastic from it embedded in his arm through his leathers. He broke his hip socket, his femur mid length (which is why the doc is supporting his leg to stop the blood supply being cut off), as well as extensive tendon and ligament damage in his knee. He also had 6 breaks in his radius and ulna, and nerve damage which paralysed his arm from the shoulder down for about 4 months. He did however suffer no head or neck injuries as previously stated. The lid did its job.
Now I would put to you that you have a vivid imagination which bears little relevance to the actual events which I was witness too.
Your helmet pictures show's a light glancing slide along the ground. And I have more of a good understanding of impact biomechanics than a vivid imagination. That helmet does not show a head but impact at 60mph.
You are correct though to pick me up on the use of the word never.