Just like any medium, most of what's made is going to be garbage not worth your time. Seriously, if you had to flip through and watch an episode each of randomly selected American TV, wouldn't you just give up?
I definitely understand not wanted to slog through the sameness, pointless weirdness, or outright perversion to get to the good shows, when you could just say, "I know Breaking Bad is good, I know The Wire is good, and I know Dexter is good. Why am I even bothering trying to decipher a whole other market for content when I can just watch what I have?"
I enjoyed Gurren Lagann, Cowboy Bebop, and Baccano!, but I've also had to sit through the agony of some less-enjoyable shows as my roommate unceremoniously blasted them through my TV. However, I also have way too much time on my hands.