Students can be adults. If they are underage students they are children and we know children are not allowed to gamble. The casino has responsibilities to protect children from gambling because it is illegal for them to gamble.
Gambling in a casino is meant for adults, which implies a mature attitude toward money and taking responsibility for one’s actions. An adult decides for themselves how and where to spend the money they have. The only thing worth paying attention to is periodic warning messages while a person is playing, to help them better control themselves.