Is Addiction to Fantasy Football Sinful?

In this episode Dr. Betters answers the question, "My husband has always been a huge football fan and discovered Fantasy Football through some friends of his. I was always taught that gambling was wrong and was a sin. I mean, we go to church on Sunday morning and then he is glued to his phone for the rest of the day. I tried talking to him about it but he got very defensive and said that it is just for fun. Am I wrong? Am I making to big of a deal out of this?"