Earlier quoted context omitted.
You wouldn’t be wishing that the first time you were in an accident.
The theory would be to rebuild it with a roll cage, harness, etc for mixed use. In theory, these safety systems are superior to airbags. The only impediments to helmets/Hans with a real harness are people who don't use the existing seat belt (airbag can prevent ejection) and they are too inconvenient for the general public.
Also two words: Crumple zones. You don’t want a super hard Skelton, that will only increase crash forces.