Reality bites, physics kills. You can’t have freedom - whether you’re an adult or a child - without the risk of harm. We live in a society which believes the risk of harm can be eliminated through constant supervision and a readiness to sue.
The issue up until now is that our entire society, from top to bottom, has taken it for granted that "safer" is always "better." The fact is, life has always been about balancing risk vs. reward, and people who are not raised around a certain degree of risk won't be able to understand it or take advantage of it (or even accept it) when they get to be adults.
How do you decide to start a small business, for example, unless you have learned to live with some risk?
That's a statement of philosophy with which many disagree. They would say that "once," people had to live with the risk of catastrophe, but "now," we can prevent every bad outcome if we only try hard enough.
It's hard for parents. If you watch your children closely, you get one batch of critics saying, "There's something wrong with them! They never let their children out of their sight!" If you let them go out and play unsupervised, you get another batch of critics saying, "They don't care about their children. They aren't paying any attention to them!"
If the children kept inside for "safety" get fat, the parents are blamed for that. If the children outside get hurt, the parents are blamed for that.