In 2010, my wife was interviewing CEOs as part of a school project. She emailed Jensen Huang out of the blue, to his email address @nvidia, and got a response and a live interview. There were a few others who were almost as accommodating, but, looking back on it from time to time, I'm still surprised by Jensen's openness and accessibility.
So I'm thinking that although he might engage only with direct reports, he's accessible to his company in a general sense.