If you are a great dramatic actor then you often don't know if people are enjoying your stuff at all because they are sitting there in silence. But with comedy it's a simple premise. If it's funny people laugh. If it's not they don't.
And I think that being able to make people laugh and write a book that's funny makes the information go down a lot easier and it makes it a lot more fun to read easier to understand and often stronger. So there's all kinds of advantages to it.
