In some religions, gambling is not allowed while other religions allow gambling. Does your religion allow gambling and is gambling linked with religion?
There are cultures from different nations where gambling is seen as prohibited otherwise it was totally illegal in country. I don't know too much about this gambling being prohibited in gambling as what matter is, I'm enjoying gambling as it was allow in my country and religion. If we have to dig more, maybe some articles in Google search might be a good reference.
Maybe we just have to let everything that way and don't create an argument, if any.