Just as secular marriages have problems, so do temple marriages.
After all, when he IS around, he never makes them do anything they don't want to do, and he buys them expensive things to make up for being absent from their lives so much.
If you marry him, you are committing to accepting him without the church and all that this entails. My husband has gone from proselytizing and thinking he knows it all to a real spiritual seeker, albeit with a strong testimony in the church.
Now, lest you look at this all and say, "sheesh, go to counseling.