Beware the helicopters.
Give kids the freedom to make mistakes and suffer the (nonfatal, no loss of life or limb) consequences.
Yes, there are cases to intervene, but generally, you should let your kids hurt themselves more. Pain is a very important form of learning. By overprotecting them, they become very vulnerable adults, then worse things happen.
> you should let your kids hurt themselves more
This is quite presumptuous. Even minor injuries can add up to long term damage. We don't need to keep our kids inside or wrapped in crazy layers to protect them. We also don't need them to get hurt a lot for them to learn what's good or bad.
They also become dysfunctional adults, needing a replacement parent, when the parent disappears- which is mostly the state, sometimes a company - and always a example for stunted individual growth.