I feel that it would really be a step backwards for me to stop MC. It seems really important to my wife, even though I don't think that it is really helping anything. In her mind, it is a safe space to talk. She is afraid of conflict, so she likes have the mediator in the room.
Two things stand out:
"This is not helping anything." Then you, as the man, need to "decided" not to go.
You need to be safe to talk to. That means shut up and listen with full attention on her and validate when she comes to you to talk. Follow all the DB rules and do not initiate. Do not let her disrespect you.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712