I think it depends on the client, the therapist (and his/her skill level), and the problems the client is seeking help for. There is no one answer. I think therapists can be really helpful for learning better communication skills and ways of relating to people. I think they can help heal old wounds and help us learn to avoid getting new ones. I think just having someone listen to you, make you the center of their attention, and understand you can be healing. I also think there are some mental health challenges which it is hard for psychotherapy to help, or at least hard for psychotherapy alone to help. Do you get a sense that what you are seeking help for can be helped by psychotherapy? Have you heard of others with a similar problem being helped by therapy? If so, that is reason to hope.