If we're talking about things from a story point of view, and not a gameplay one.
I'd say that it doesn't really matter if the hero can beat all the thugs you can throw at him, as they're disposable anyway. The ultimate goal is to just show everyone that they're not really as heroic as they pretend to be while keeping yourself as the villian alive at all costs.
Though that's just my opinion that loves using thugs/time