I am sure that most parents are doing the best that they can already, it is just that now in many countries around the world both parents have to work in order to keep themselves afloat, and this is causing that many kids are growing without a strong parental figure that can guide them, so many of those kids are now looking the answers to their questions online, and as we know they can find all kind of mistaken information there that could warp the view they may have about gambling and they may try it at such an early age.
Kids actually are not look for answers, they just look at what YouTube or google search and suggestion script gives them. As you say, parents work a lot, and to keep kid busy, they gave them tablets with full access to internet. What parents get with that? Few hours of free time and a kid who believes more to what a guy from short video say, than their parents. And with "never gamble in front" meaning, spending even less time with kids, the problem of wrong world understanding only grows.
People should ask themselves, is showing gambling to kids really that bad? I bet most of gamblers here, found out about gambling before they turned 18. Did bad things due to knowing it early really happened to you? Have you became addicted due to that?