There is that old joke about gambling to just illustrate this.There was a king and had a son who started drinking alcohol and the people near the king told him about his son,the king said no problem.The son then started going with women,prostitutes and the king also said there is no problem.When the son started to gamble the king said,stop him immediately as he is going to destroy us all.
This joke illustrates perfectly that gambling does not look at who you are and most people who do not have a great self control can easily fall under addiction from gambling.
Sad thing is it isn't even a joke imo, what the king said was perfectly reasonable, it WILL destroy them. Gambling is like a plague, it doesn't just damage one person, it damages everything around that person slowly but surely.
Some people will prefer to select skilled-based gambling games as they know more about them than other gambling games. Besides that, they think they will have many chances to win on that skill-based because they already know how to do with the games and try to win. At least, if they can learn more details about the game from many lessons, they can increase their chances to win. But we know that both skilled-based and chances-based have a risk and we should know to prevent the big risk.
Honestly, there's no such thing as "skill-based" gambling games, it's still dependent on your luck imo. If they were looking for something they can win by having more knowledge about it, gambling isn't the game for them. Yes, I know what skill-based gambling games are, but those are still called "gambling" games, see my point? They might just be better off playing games like Hearthstone and participating in tournaments and the like.