By careful I mean every father should gamble carefully. His gambling should not be revealed at least to his child because if a child comes to know that his father gambles then that child will follow his father and start gambling himself. It is called inheritance. I'm not saying that no parents should ever gamble
Why not gamble at all, it is better as a parent to be a role model if we are about to tell our kids to not gamble at all. It is very disappoint for kids to know their parents is gambling despite the fact that these same parents told them that gambling isn't good. As a parent if we are engaging in gambling activities, I think we don't need to hide that we are gambling to our children, all we need is to talk to them and explain everything, why they shouldn't gamble and when they are permitted to engage in gambling activity.
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Would it be better, if children from early age understand the whole path of a gambler and being addicted? To test everything on their own skin. Would it better if they gamble and lose in childhood, that when they turn adult, they would already have experience. I mean, when they are kids, they cant make as big fails as they make while being adults. Isnt it better for kid to lose lunch money and learn the lesson, than to lose a monthly salary at the age of 40 ?
I understand that you are referring to "learning by experience". But think of it... what if these minors are not yet disciplined and feeling responsible for any money that they use regardless if they own it or not (from parents/guardian).
It would not be a good learning experience. So better to have a proactive and reactive solution to this one. Imagine if they use hundred of thousands of their parent's funds.
Minors need proper guidance else they will think that what they are doing is right, besides minor's emotion isn't as stable as adult and is less matured in facing problems created by to much gambling activities.