All emotional reactions are "manipulated" - we choose to expose ourselves to situations wherein we might feel emotional reactions of various sorts. Why is art, "negative" reactions or not, any different?
As another commenter points out, it's a good way of learning - about yourself, how you feel, about other perspectives. It's also, hopefully, a chance to grow - reflect on your past, your mistakes, how you've treated others.
As another commenter points out, it's a good way of learning - about yourself, how you feel, about other perspectives. It's also, hopefully, a chance to grow - reflect on your past, your mistakes, how you've treated others.