No, we're agreeing on that.
I'm saying that most of the benefit in a typical racing situation comes from seats and restraints. Look at some of the wrecks from the cup series race last weekend at Indianapolis. They're not walking away because the wreck took a long time. They're walking away because they weren't bouncing around inside.
The human body can survive plenty of G forces.
http://www.ejectionsite.com/stapp.htm
"Stapp'd endured 25 Gs. It was the equivalent of a Mach 1.6 ejection at 40,000 feet, a jolt in excess of that experienced by a driver who crashes into a red brick wall at over 120 miles per hour. Only it had lasted perhaps nine times longer. And it had burst nearly every capillary in Stapp's eyeballs. "
"Stapp had already proven what he'd set out to prove: that a pilot, if adequately protected, could survive a high speed, high altitude ejection"