You are even talking about gamblers who are still schooling? In third world countries where the rate of graduate employment is high majority of them had resorted to gambling to escape poverty and to make end met most especially soccer fans of foreign clubs like EPL and Laliga who passionately support their teams and are utilizing that opportunity to bet on their team, there are only few of students who gamble anonymously because the recommended age for gambling is 18+, in as much as they gamble responsibly and meeting up with their financial need then there is no gambling disorder that would affect them except if they choose to become a gambling addict that is where a problem will come in.
If the OP speak about the people who do the gambling from the school days,then the gambler will earn huge knowledge from the gambling.He may loss at the beginning,but after the graduation of the degree the gambler will be the experienced enough for the gambling.The gambler from the third world countries will do the gambling from their school days to get away from the poverty after their graduation and to live the peaceful of life.If the gambler from third world countries had win the game with the big money,this surely will bring the happiness to their family members.The winning gambler generation will get free from the poverty because of the gambler effect from his school days in the gambling.