Probably overprotection by parents. When I was a kid I was left alone with my friends with no parents supervision a lot.
We did very risky things and risked our lives several times, but in controlled and normal environments like climbing trees and going to the mountain. When something went wrong you will get painful feedback like bruises. But you knew what your limits were.
Quite interesting, those children that had their parents forbidding them to go with us actually had traumatic experiences later in life, once they were free from their parents. They will buy a motorcycle or car, take risks and die or almost die.
It was like they lacked the experience we had and replicated it, but with machines in non humane environments. Instead of bruises they will crash a very expensive car.