Sometimes, criminal scoundrels need to be stopped—it's true. But dang, Skyrim guards, just because some Dragonborn get out of hand doesn't mean you can just do whatever you want!
Granted, it's the guard's willingness to do things like sick a vicious dog on someone or outright kill a suspect that makes this Cops parody by Nerdist funny. And to be sure, sometimes its not ineptitude that makes it silly—it's just that the guards find themselves in ridiculous situations in which there's no right way to act. So it goes!