Well, not exactly--what I'm saying is that a lot of things go into good storytelling, and even if one aspect is weak it can still be a good or at least enjoyable story. For example, if someone's telling a story and is amazing with voices and facial expressions and turns of phrase, you're less likely to notice or care that the story is the same predictable old thing you've heard or read a million times. Visual storytelling--which definitely includes graphic novels--has the advantage over prose fiction because it has more tools at its disposal so the basic narrative elements don't have to carry as much weight. A Deadwood novel would need a real plot. The TV show, not so much.