Are you saying that students are more likely to become addicted to gambling?
In my opinion there is no social condition or age to become addicted, but only a psychological condition of need for dopamine and other substances that give pleasure. This is why addiction is difficult to defeat.
The reference started as opening casino near student areas and also in campuses and when you put in some factors, it's actually possible to see because students in general have one thing in common and that's money, every student need money to do everything they want to do in school and if there is any chance of doubling money anywhere, you will see 8/10 in that place that's why I think he feels student can be addicted to gambling.
There are many situations where student lose their tuition fee to casino and in be verge of trying to get some money back, they end up losing everything and instead of quiting, they don't know when to stop, they go all in to gamble more to become addicted and some even become depressed and confused. Some students do find it hard to move on when they lose to casino and that's why it's not advisable to open a casino near student vicinity.