The boundaries between gambling as entertainment and pathology have been erased. The frequency of cases of pathological gambling is increasing all over the world, which is associated with the legalization of institutions that attract thrill-seekers: lotteries, casinos, racetracks, and slot machines.
Psychologists note that gambler children at an early age are characterized by increased sociability and lack of shyness. Craving for the game is more often observed in children from disadvantaged families, as well as from families where parents play. The gambler child is constantly under stress. This condition is a favorable ground for the development of drug addiction.
Given all this, do you think it's worth organizing separate lessons in schools designed to tell children about gambling addiction? That is, to tell children about gambling addiction separately from addiction in general - alcohol and drug addiction.
I would say the rather stealthy moves in the games industry towards micro transactions and lootboxes are probably the largest factor in introducing children into gambling like behaviors. It is definitely going to be more important to educate younger generations about these relatively new phenomenon and remember that the gaming industry is always trying to push new methods of squeezing small amounts of money out of all players. It's a bit silly, but teaching mathematics and how it really works in the physical world is still developing in curriculums around the world, like emphasizing that the many small transactions over a long term can add up to really sizable amounts and it can all be wiped out if a game developer decides to shut the support network down.