I know. I've called this out once before. I know a couple extended family who pulled the old "conversion" marriage. Both had their wives leave and divorce them. If I were a priest, I wouldn't do these at all. If the prospective spouse converts after marriage, that's fine. Very few such pre-marriage conversions are real and sincere.
I became Catholic while engaged to my husband-to-be. My conversion was real and sincere, although, due to the horrendous Novus Ordo instruction I received, I was incredibly ignorant about the Faith. For example, I thought that private Confession had been replaced by group Reconciliation services and did not even know how to go to Confession. I thought that the Rosary was from back before people were literate and someone like me had no reason to pray it. I thought that birth control was up to the conscience of the couple. Etc.
So, to a large extent, I did not even know what I was converting to. About the only doctrine I understood correctly was that the Eucharist is really the Body and Blood of Our Lord. I knew this because I had learned about it in a high school history class, not because I was taught it at the Novus Ordo.