I did not say theose people don't have them. I said I don't believe a client needs to build up the therapist. If you want to do so fine with me. The therapist's feelings and ego is not the focus of what a client is supposed to worry about. A client pays them to keep those things out of the client's way.
I don't see the OPs letter as particularly hostile or childish or attacking. I would not think it wrong if it was, just that it is not from how I read it.