“Usability is like cooking: everybody needs the results, anybody can do it reasonably well with a bit of training, and yet it takes a master to produce a gourmet outcome. […]
There’s a level of excellence beyond the basics: Going to a fancy restaurant and eating a meal cooked by a master chef is vastly different than eating something you throw together yourself in 20 minutes. Similarly, a usability expert will give you insights into your users’ needs and your possible design directions that are much deeper than advice you’d get from someone whose main job is in a different field.”