The oh-so hilarious and gifted Cho explained herself in an article on Huffington Post and here is part of what she write:

"...With the writers on strike, I am unable to do it. This was a very difficult decision to make. I absolutely love Ellen, for a million reasons and for a very long time, but because of the way that I was raised, because my political views are they way they are, because I believe that workers should have the power and the ability to make their lives better, because many of my close friends are the ones picketing, I cannot cross the picket line. This was hard for me because I had to question what was more important to me -- my queer allegiance to Ellen, or my dedication to the writers and their families and all the people who have been sacrificing so much to the strike."

"The reason Ellen hasn't stopped production is because she refuses to put the 135 people who are employed on her show out of work, which is completely admirable and frankly heroic, considering all the flak she has gotten from the media," she continued. "I apologize to Ellen and I hope that she understands my decision, and that when the strike is over, I will be able to do the show again. It has been a dream of mine for quite a while now, and I hope someday it will come true."