I think the idea isn't so much that punishment doesn't get results, but rather that those results come with side effects. Usually, this is some harboured anger, or avoidance of the parent.
Yes, punishment gets changes behavior, but it's not always a 100% positive change.
It should have been phrased better in the article.
You're projecting your own reasonable beliefs onto the article. It really was as stupid as SiVal said.
It follows the rules of political correctness: Any evidence supporting a taboo idea must the denied. Any advantages of a taboo practice must be denied.
Calling out something for "political correctness" (or any one of another dozen or so convenient shorthands for political footballs) is a lazy argument. I'm sure there are things you disagree with in the article. What are they? Why? Do you have something more to add to the point SiVal made? Personal experience? References to research? Add something constructive to the discussion.
"You don't try to suppress— “Don't give me attitude for all I've done for you!” What research shows is that it will lead to escape behavior on the part of the child. It will lead them to avoid you as soon as they get home from school and it will model negative interactions toward you."
Yes, punishment gets changes behavior, but it's not always a 100% positive change.
It should have been phrased better in the article.