What does the type of gambling matter? If we focus on the core issues: greed and money problems -- over trying to "protect" [my emphasis] others from the bad gambling -- we end up helping them with adjacent greed/money problems. Labeling outside things as the problem is the problem. Help the people learn to master the inner compulsion towards these things (and other skills to help pull themselves out of dire situations); the rest is just trying to find an enemy to blame because helping others in a real way is hard.

Greed (in a generous def of the word, as in the wanting/desire of as much of the thing as possible [money in this case] quickly and/or easily despite the cost) is a root cause of many of the issues people create for themselves with gambling.