I've never seen so many tears at a conference! A lot of the tears were from the authors themselves when they shared their pieces--several of which were inspired by real life experiences. I myself wasn't immune. Of course, when writing is emotional and when writers are emotional, it does tend to be a bit contagious. Also, there were some tears during the panel when the question was raised if writing is "worth it" when success is so elusive. All writers wrestle with this question. I'll leave it as an exercise for the reader to define "success" in way that enables him/her to keep writing.
But bigger picture... It's imperative for writers to bring emotion to their work. It's difficult to evoke emotion in the reader if there's no emotion on the page. I know for my part, the pieces I got emotional while writing were the ones that sold.
So, good luck being emotional!