Young students who get pocket money from parents shouldn't think about gambling. In poor countries parent can't educate children with out suffering. If they start gambling they'll betray their parents it isn't fair they've got to graduate & help their family.
Those who do anything unfair are not aware of that, and they do not think about the things they are doing. If they are aware that it is unfair, then they would not engage with anything like gambling and/or drinking. Actually, they usually do something that is not fair, but unconsciously.
We all know very well that both gambling and drinking are harmful to health and mentally, but even then most people are strongly attracted to drinking or smoking. Despite knowing this, everyone expresses a strong addiction to alcohol. Yes, we have an innate attraction to forbidden things, due to which we are subconsciously attracted despite knowing the harm.
Gambling is also similar, despite the financial losses and the possibility of severe family damage, and most gamblers are attracted to it. Yes, it can also be said that subconsciously we are strongly attracted through the neurons in our brain, even though our brain knows very well that gambling is harmful.