They bring poverty, not wealth. He that hastens to be rich hath an evil eye, and considers not that poverty shall come upon him. Gambling is destructive. It affects our walk with God. It indicates a lack of trust in God's ability to provide.
True riches are spiritual and eternal.
Gambling expressly denies God's sovereignty and care. A form of covetousness, gambling violates the tenth commandment. Gambling destroys contentment. Gambling destroys families and communities. Gambling robs money from the family, for which parents have a responsibility to provide.