"Playing roles that are intense and damaged has always come more easily to me than doing comedies or lighter stuff - that would be taking a huge risk for me"

This quote by Sarah Polley talks to the trouble of taking risks in her acting profession. She is stating that it is easier for her to take on extreme and damaged functions than it is for her to handle lighter roles. This suggests that she is more comfy in darker functions which handling a comedic function would be a big risk for her. It might be that she is afraid of not having the ability to manage a comedic function, or that she hesitates of being typecast in a specific type of role. Whatever the reason, it is clear that Sarah Polley is not willing to take the danger of taking on a comedic role. She is content with the functions she has taken on in the past and is not going to take the danger of trying something new.