I am personally acquainted with a Kohen Ba’al Teshuva who had to divorce his wife when they found out that he wasn’t allowed to marry her since she was a Giyores. There were no Shalom Bayis issues, but the Halacha required the divorce. I was good friends with one of their sons who is a Challal, and whose younger brothers [from his father’s second wife] are Kohanim.
cantgetit, seahorse:
The Gemara there is discussing the legal possibility that a divorce may happen over such trivialities, not whether it is recommended. In fact, that same passage of the Gemara says that if someone divorces his first wife, even the Mizbei’ach cries over it. Divorce without strong grounds is strongly discouraged in our Halachic literature and in our culture. Halacha also prohibits a man from divorcing without legitimate cause.
In any case, if there were true Shalom Bayis, it is inconceivable that a man would divorce his wife over a burnt supper, or because he found a prettier wife.