There's some good advice here, but I don't know how evidence-based it all is. For example, I understand that there is some evidence that extrinsic rewards have problems when delivered in certain ways, but I don't think we've entirely overturned behaviorism. Rewards and punishments are a tool that the world uses on us, like it or not. It would be surprising if there were no place for that tool in child-rearing.

Likewise, I question the advice to not involve oneself in children's fights. If one child is much bigger than the other, they can impose their will on the smaller child. Growing up, I saw friends who were on the losing side of this exchange, and it can be scarring.

Still more of the advice is well meant but impractical. "Never do for the child what they can do for themselves." Suppose I have a flight to catch, and my son refuses to put on his own shoes. Am I to miss the flight then? My son can be stubborn. On one occasion I tried to follow this advice when he refused to walk himself home. We stood on the sidewalk for half an hour in twenty degree weather before I gave up and compelled him to walk home.

I suspect, like much parenting advice, this stuff works for some kids and doesn't work for others. So much of parenting advice is survivorship bias. That a particular technique works for one child does not imply it works for all children. I can buy that these points are effective for most children, but ultimately you have to do what it takes to survive, and part of that is tailoring this stuff to your unique relationship with your own child.