I think the loss of children's rights is only partly due to overprotective parenting. A lot of it is from lack of access to business services for minors.
You can get a driving license as a minor in many states, but you can't take an uber till you're 18... https://help.uber.com/h/4e0a8853-f252-4a49-a181-aff7a2e0ec15
Seems to me, taking an uber is safer than walking, riding a bike, which minor's are allowed to do also.