This deck is interesting and mostly a good way to look at many information presentation situations, but it is another instance of the recurring theme of annoying absolute statements from self-important designers.
There is bad design, there is good design, there is no "proper" design, and any designer who claims so needs to check their ego at the door before you hire them. Design and style evolve, and much of it involves fashion, fad, style, and preference. These elements evolve over time, vary between situations, companies, and products, and are part of the character of the statement design makes.
This presentation would be considered boring in some situations, depressing at others, ultrachic in others.
Not everyone wants to sit on purple glowing cubes with a fernet milkshake under mood lighting in tight pants. Some people enjoy sitting on saddles, twirling their mustaches, and line-dancing the cowshit off their boots.