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So the solution could be to adopt kids to current gambling-all-around realia's. That does not mean that parents now must teach them to gamble, make a gambling class in school, no. But parents should not hide gambling, have more talks about it. And not explain from "gambling is bad for you" point of view, otherwise kids wont understand, why it is bad, but a lot of people gamble and gambling is around. Parents should teach where is that line when fun stop, when to stop, and when problems starts to turn from snowflake into avalanche.
It would be about killing the taboo indeed and turning gambling into something which could be culturally acceptable to talk to children and teens, for their own good. It would be a little bit similar to talking about sexual education to teens, there are defenders and detractors about it.
But what would be the ideal environment and time for parents to address this topic with with children? In the eyes of a parent, a responsible one, it would be ideal of their children never stumbled with casinos or sport bookies, which is unrealistic.
It needs to be done as soon as the children/teens understand how chances work (or kind of works) and also when they are old enough to view the providers of gambling not only as providers, but also as business people who are selling a service/product to them, so inevitably casinos and bookies will always win money out their activity.