I get your point and if you ask for my opinion I will also say same thing but I think most western culture or way of life are ignorant of some of these things as the world with them have become so free that the children are constantly exposed to such habits even without the consideration of the effects(negative) that can get to these little observers. Although I know that human are of different types as some are ignorant and careless and do fall under this category.
Restricting what your children could watch was easier decades ago, because back then kids had very little access to technology and at most only their friends could expose them to gambling early on.
However thanks to the internet not only kids are exposed to all kind of things at an inappropriate age, now parents are not even aware this is happening as it is impossible for them to monitor everything that their kids are doing online, since it is often the case that parents are way behind in the use of new technologies compared to their own kids.
I admit that limiting viewing for children is very difficult because nowadays, children are used to watching shows they can easily access. With more advanced technology today, they can choose what they want to watch and even do it without the help of their parents. This is where parents supervise their children to be able to tighten their rules towards their children so that they will not be influenced by anything they see. Husbands or wives need to know this so they can think about whether they should reduce their gambling activities for the sake of their children and maybe stopping gambling is best for them.
This is not a matter of who should stop, but it depends on each individual's awareness, husband or wife because this is their responsibility. If they could realize it, they would think that they both need to stop gambling.
In a family where the husband gambles alongside the wife, there is no doubt that people may think of their children as future gamblers. Such perspectives aren't wrong, neither is it a threat to the future life of the children. The most crucial duty is the act of management; kids, family, money, food, bills, etc. These few utilities shouldn't compound to become a problem in any family. Both gamblers must be able to instruct their children on what to do at a specific time and monitor their internet access. Recommending a keylogger installed on the devices or gadgets of the kids would be important. So that the parent would be able to observe any single search the child is inputting on his system. Children are very skillful and fast at adapting to new technologies, hence parents must act as adults too, by staying extra hours in researching for means to stay ahead of their children. The kids we own are our responsibility, they should be grown in a way that pleases us, and if one is found misbehaving, the parents must caution the child to stop. Or be punished. What kind of punishment is effective in changing a change?
In previous years, our parents were used to seizing our gadgets or maybe restricting us from going to participating in games we love like football, basketball, etc. Those moves weren't effective, in my response, because at some point they weren't able to keep up with the pace and got tired, hence the child continued with his bad habit. Punishing a child could be done in different ways, when I want to change a child, I don't buy them what I bought for others as a punishment. That child would have a rethink or sometimes cry over it. Such things leave a mark on the child that lets him remember that whenever s/he misbehaves his parents won't buy him gifts when they buy for his siblings. Then that child would begin to shape his ways, to be eligible for the next gift. I've used this method to get most children close to me, interested in mathematics and they hardly fail on doing their maths assignments. Parents can as well use this to caution a child that feels the urge to gamble as a minor.