It had never yet crossed the minds of adults, helmets certainly were not a mainstream product when it comes to protecting kids.
Parents loved their kids just as much as ever back then and you could feel the full force of their protective nature, even if it doesn't always appear historically so.
Whether hardened by war or anything else, what really started the helmet "craze", whether it's kids wearing them or not, and regardless of increases in dangerous road traffic, helmets really started to fly off the shelf like never before, once the greatest threat of all started escalating risk through the roof.
And it was adults who needed to protect themselves like never before.
From lawsuits.