One of the aspects of a dominance hierarchy, which is what our still very patriarchal society is, is that you are part of a pecking order. You are either above or below the people around you and men, in particular, are trained to take abuse from above and to dole it out to those below them. I think this is why this notion of benefitting from bullying still exists to this extent, but as you’ve so aptly pointed out, it’s not beneficial to anyone, including the bully, and certainly not to the victim of bullying.