There is something incredibly important about a therapist I would not discard. And that is the human connection. We are hard wired for this and most often what people need out of a therapist is being seen. Another human being to fully and unerringly see you. To get to know you well enough to simulate /your/ thought loop and reflect it back to you, potentially with some meaningful observations. But that knowing that some other human sees you is mostly what therapy is about to me, some exceptions, of course, but in general

Also: incompleteness theorem again. The system cannot fully observe itself. A close friend can also do this too. In fact they are better at it than a therapist if you are open with the friend.

Also evil is a moral inclination and hard to discuss easily in this frame. Very little that is inherent in our machinery is disinclined towards evil or good. As social animals we must teach those values and hold them up. Different discussion :)