Wolf, I though the implication from the teshuva’s I cited
Ah, but I didn’t see the Teshuva. I only looked up the perek of SA that you cited.
Nonetheless, it’s then obvious that the Mechaber’s list of reasons for grounds for divorce are not exhaustive.
It should also be noted that the Mechaber is obviously only talking about where one of the parties is contesting the divorce. He makes no mention in that perek about where the breakup is mutual.
The Wolf