Grabbing your childs arm roughly and yelling at them when about to touch something hot is fine and expected. Yelling at them and telling them to behave when they hit their sibling is fine.
There is no one saying these things aren’t fine. They give examples of verbal/emotional abuse in the article and study and they are not this. You are creating a strawman argument no one is saying (grabbing your childs arm when about to touch something hot is fine; yelling at them and telling them to behave when they hit their sibling is fine) and using that as a reason to dismiss the conclusions of this study