If someone is mentally unstable, then there must be some kind of lunatic display from their way of behavior, now the question is, how could such a person know how to gamble, get money to gamble and also gamble in a responsible manner, we cannot pretend that we are not aware of the fire set on the mountain when the disaster approaches, we will only constitute to their problem by allowing them to gamble, instead, we can engage them on other sports and gaming activities other than gambling.
Yes that makes sense, and the question is yes as you said that how is it possible for someone who has a mental disorder to be involved in gambling regardless of whether they are gambling at an online or physical casino, and it is also of course less likely for those who have a mental disorder to can calculate their every action and decision, and it should be reasonable to say that they would not know how to gamble like the average gambler does.
That all makes sense, friend, and let alone gambling responsibly, I'm sure they won't even know how to gamble, so it's best to eliminate all ties to gambling, because the first step you should take is to help cure them if that's possible, but Otherwise, licensing involvement in gambling for people who have mental disorders is unnecessary or even pointless to do.