The TV show started in 2011.
Kingkiller Chronicles is only 3 books, hardly epic. It's a trilogy. The first book came out in 2007, second in 2011, and nothing has been seen of the third, and presumably, final book.
Brandon Sanderson treats writing books as a job, thus he writes every day. Now you could argue that his books aren't as entertaining to you (subjective) or that his prose isn't as good (a bit less subjective), but he does treat his job like a job. Whereas Rothfuss and GRRM seem to try to do literally anything but continue writing their books.
Sanderson isn't a bot but he has something a lot of people lack, work ethic.