"...Massa also hit a wall of tires at 200+ kph. I know they were there to absorb the shock, still, try doing that in a regular car..."
Is a Formula 1 car any better in an impact than a modern car with, say, 5 Euro NCAP stars[1]? I had a quick Google and it seems that the most important safety feature in this situation is the head and neck support system:
"The leading causes of death in auto racing accidents are skull and neck fractures resulting from rapid deceleration during accidents. The Head and Neck Support system (HANS) was designed to reduce these whiplash effects. The system consists of a collar that is attached to the safety belt and strapped to the helmet to hold the helmet in place during an accident. HANS usage became mandatory in Formula One racing in 2003." [2]
[1] http://en.wikipedia.org/wiki/Euro_NCAP
[2] http://wiki.answers.com/Q/What_are_the_three_main_safety_fea...