Catharsis isn't art. You can't rely on catharsis to get a laugh. Because guess what? People do laugh when something's shocking, but that is, to me, the absolute fakest of laughs. That's not something that sustains a television series, or a movie, or even 45 minutes of a stand-up set at Carolines.
So long as the opposing forces are at the outset approximately equal in numbers and moral and there are no flanks to turn, a long struggle for supremacy is inevitable.