It is gratuitous because is assumes the reason is because they went to a Yeshiva. There are always people who do bad things. In spite of the best Yeshiva education.
Then I was less than clear. I did not mean to imply that they failed because of Yeshiva. What I meant to imply was the question that you did — why, despite going to Yeshiva, do some people (like myself) turn out horrible, despite the yeshiva education they received.
The Wolf