I'll be sure to tell every race sanctioning organisation in the world and their safety committees that they have it all wrong with the substantial roll cages/safety cells they all mandate ;)
Yes, they all use crushable structures too, you need something to absorb the massive energy inherent in a large hit (other than the human body) but a roll cage works extremely well at higher speeds/impact energies too, and if designed properly, particularly with multiple hits.
I could always wear my Simpson Shark helmet
https://www.aulro.com/afvb/images/im...013/02/728.jpg in the Deefer for better head protection than any side airbag will give :angel:
(In all seriousness I'd hate to have a side hit in the Defender, the upper seat belt bolt on the B pillar will centre pop the drivers temple IMO)