The article makes a point that the absence of physically risky activity might be the reason for obesity in children.
That’s possible. As a child I walked everywhere until I received a bicycle for my birthday (12th). We really did walk to school, to the beach and climbed trees in the woods, stringing swings over deep gullies. All day long we were absorbed in some form of physical activity. Horses, were de rigeur - but we had to clean tack, take the herd to pasture, muck out stables and give riding lessons to earn privileges. I feel so blessed that my childhood was in the golden age.
I think kids are becoming too safe to learn some pretty basic self taught lessons.