I agree with you bud, like I said in my previous comment, there is no way I am going to be under the same roof with a woman who gambles, and this may not be to the fact that we may both get out of control, but for the fact that, we both gambling will surely affect our children.
Imagine where the father and mother In the house are both gambling, what do you think the children will become when they grow up or even before they grow up, they probably will become gambling addicts even while still in their mother's womb

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Now, jokes aside, it's a real fact, I will rather quit gambling and possibly continue doing it in secret if I really can't do without it, and have my wife quit too, it's better we both quit than continue gambling and have it affect our children.
But what would be the problem if your children saw their father and mother gambling sometimes? If you play responsively without compromising your children's education, personal emotional and material needs, they will see gambling in a very natural way, just like you do, as a couple. When they grow up it will be up to them to decide anyway, if they will want to become gamblers as well or not. There isn't a certain recipe for the development of an addiction or hobby. Sometimes children follow their parents' steps, but in other cases they just go the complete opposite way rejecting everything meaningful for their parents.
If you and your wife enjoy gambling, that is something you can do together for the entertainment of both of you. It's so hard to find partners inside a couple who enjoy doing the same things. People are so distant from each other nowadays, that I think when we match in our preferences of hobbies we should enjoy and be thankful for that.
Well, I perfectly understand the angle you are coming from and I completely agree with you, but to be honest with you, there is no gambler out there who would say that he or she had never felt really bad about a loss in gambling, no matter how responsible the gambler is or tried to be, the truth remains that, there will always be times you may lose a game you had high hopes on, and there is a very high chances that you may transfer or use that anger to attack your children necessarily, now, think of what such scene will be like if both parents are involved.
Now, I know my argument or opinion above doesn't really mean much, but personally, I just don't find it fun gambling alongside my partner(wife), if we do something together and have fun doing it, we could watch a movie together, or play video games together, or may be visit places and so on, I just don't find gambling a fun thing to do with a partner, probably because it involves losing money.