Saying that social scientists need to be taught intellectual humility is tantamount to saying they are not scientists at all, which seems to be the real problem.
In order to fight some of our worse qualities, we have to first identify them. Then break down any social barriers that keep us from not fighting them.
That is what this article is doing. It is naming one of them, and then asking us to be forgiving. And helping us realize that mistakes are not as punished as we all may think.