With the trend of minimalist and clutter-free design, sometimes it is assumed that users prefer to search above all else. But often that’s not the case. Typically, people use search if they know exactly what they’re looking for, or if they cannot find something through browsing.
Search should only be the primary navigation for a website if the site’s main function is to be a search engine. For example, Google, Bing, and job search boards can all use this approach. But in the context of an information-heavy site like a university, browsing is essential for increasing discoverability of content.
KATIE SHERWIN: http://www.nngroup.com/articles/breaking-web-conventions/