You sound like a sith dealing in absolutes.
There's always a grey area that's worth to be discussed.
I agree parents have gotten a little to soft when disciplining their kids.
But you have to realize that not everyone has such perfect family structures and laws and processes have to deal with it to help protect these children.
For every parent that's soft on their kids, you have a parent that's actually too violent and beats their children unmercifully.
That goes for emotional abuse as well.
I completely disagree that a child should fear their parent. If you take this mentality, this is a big reason why you have young children committing suicide instead of discussing their emotional stress with their parents.
A better way to put it; a child should fear the disapproval of their parent while also developing an identity to decide if their parent's actions are right or wrong.
If you take your view, then you are opening up the door for the next Timothy McVeigh, Eric Harris, or bully/suicide set of kids next to take their matters into their own hands without carrying about their parents.