This graphic visualises four elements that are necessary for a successful “good” visualization. i.e. one that works.
All four elements in his graphic seem essential. With just two, you get something prototypical and sketchy – which is okay if you’re at an early stage. With three, the end result is strangely lacking.
See how, interestingly, if you combine information & function & visual form without story, you get “boring”. Something that looks good but isn’t that interesting.
Similarly, if you combine visuals, information & story without considering functionality and your goal, you get something useless.