There's just certain aspects of the industry you can't solely learn from University. For example; Time Management is completely different. At Uni you might get 12 weeks to complete a project, but in the real world you might only have 1 week to finish the job. Within this time you might also have minor tweaks, emails to deal with, and clients to manage.
Speaking to clients, managing their expectations and listening to feedback is all vital too. That's why we offer all our work placements on the basis that you WILL be working on live projects and getting stuck in, rather than just answering the phone and making tea and coffee for guests.