I would go also. I consider this part of the recovery process for the A and the spouse or SO.
You sound as if you are living in the past, his past behavior and you haven't come to terms with it or let it go. Hearing him speak may help and he's right, it is part of his recovery and hopefully he will help someone else.
You need to think of it this way also, if you don't want to listen him speak, I'm sure there are several women who do ...... just some food for thought.