If Jobs had to reply, all he needed to say was "I'm sorry, but the Media Relations Department responds to requests from accredited members of the media only."
Actually, THAT would have been inexcusably arrogant. Treating the student like everybody else was a much more democratic reaction.
Incidentally, I just passed a micro-electronics exam and I didn't do too well (not that I studied hard, I am doing the course in the evening after work). And Steve Jobs totally didn't help me getting a better grade.
In contrast to the journalism student, I am a real Apple customer and have been for over ten years. I currently own a 2009 Mac Pro (two CPUs), a 2006 iMac, and a 2007 MacBook as well as an iPhone 3GS and subscriptions to the Apple Developer Tools for both iPhone and Mac OS.
But it wouldn't occur to me that therefor (or for any other reason) Apple had a responsibility to help me get better grades, even in a field related to their products (the course is about embedded systems because I am interested in mobile phone programming).