I agree with your opinion, that there are no genes or hereditary gamblers, but gambling is a habit of someone who has done it, whether for a long time or recently, and this behavior will make someone addicted because there may be two factors, namely hobby. as entertainment or at the same time making a profit so that you are addicted to continuing to do it.
Therefore, the older generation may have experienced what I said above, and this will trigger the younger generation to try gambling because they only saw or perhaps heard stories from the previous older generation.
there may be no hereditary gamblers, but if a person is continuously expose to gambling related activities, he may form a habit as well. but if they will see it on an occasional basis, like when your football or basketball team is playing, i don't think such young person will be a habitual gambler. they will more likely see it as a form of family entertainment or bonding activity among family members.
also, if a young person may see his older family got addicted in gambling, and got so much troubles, either he will follow the steps of that person or change his path not to have the same kind of life. this will depend on the person himself, it is by no means in the genes of the person to be a gambler.
Agree with you, that when someone gambles uncontrollably then this will become a habit for him and this behavior is not good for the future, but if he only sees gambling once or twice then it is not certain that the person will follow it because maybe he doesn't understand it yet. . or confused about how to gamble. If we look at sports betting, of course we will enjoy the thrill of the game, not only who will win, sports betting will also create closer relationships between family and friends and that is the positive side.
From the experience of the older generation in gambling, it will certainly be a lesson for the younger generation in making decisions, whether it is good or not to imitate and the younger generation must guard their minds well and always be introspective. so that you don't take the wrong steps and for the good of your life in the future.