I agree with what Committed said...... when we talk about things with someone who is willing to sit with us and ask questions, there's a different dynamic that goes on.
I know exactly what you're saying. When I went to treatment the first time, my biggest fear was that I'd be the model patient and come out just the same. I had a degree in Psychology, knew the problems I had and all the "answers" they'd throw at me. I also knew why those answers hadn't worked, etc. etc. blah blah blah......
The thing is: that's all head knowledge. It's one way we avoid what's really going on - we intellectualize it. All the emotions and fears are below the surface. Sooner or later, in counseling, they'll come up (and it's not always a good feeling at first because we don't want to feel vulnerable). It's worth it though - glad you're thinking about taking the challenge!