Some people would like to hear about things ever harder to avoid, like Christ.
Christ often talked about money because money often becomes an idol that we put ahead of God. Jesus used parables and other teachings about money in order to demonstrate that we are hopelessly lost without a savior.
Money also represents our stewardship over the gifts God has given us that we are expected to use to glorify Christ.
Christ also talked about good marriage because marriage symbolizes Jesus’s connection with the Church and in order to understand that connection we need to understand marriage.
Yes, like I said. It is very hard to avoid money and marriage when preaching from the bible. Most parables are about money, Jesus’s first miracle was at a wedding, etc etc.