[close04]

That's true but only because it mimics real life. The defenders are always at a disadvantage here, they have the boring job but one where one mistake is one too many. And they have to achieve that perfect score while operating within the rules.

On the other side the attackers have the more exciting job and only need one success which they can achieve by using whatever means they see fit.

You'll see this outside of IT just as well, like in sports. Goalkeepers (defenders) vs. strikers come to mind but at least there they all operate within the same set of rules.