Wow, I forgot how priggish that quote sounded.
I figure if you've got something genuinely wrong with you, then yeah, there's advantages to therapy. But for most people the therapist is just providing the same role in our society as the hairdresser or the confessional booth or the Internet. There's a hell of a lot of people who just don't have anyone who they feel able to talk to about how they feel. I guess it fulfills that role. But I think personal growth has to come from within, and talking to others is only going to help so much.