...On the other hand, a total ban on gambling doesn't solve the problem either. Do they think that a total ban means people who gamble can't gamble anymore? Nah, I don't think so. ..
Of course, old players who have been banned from gambling legally will look for opportunities to continue playing. But the fact that the number of new players will be minimal is an indisputable fact. So in any case, the number of players will be less than before the ban on gambling.
Government banning casino they know some gamblers will still look for a way to keep on gambling but what they are interested about is to reduce the rate of gambling because they know it will reduce the rate of beginners. But for me gambling is a game which the government is supposed to understand because some beginners will still look for a way to get into gambling. Since the government can't completely control gambling their is no need to ban it, it would have been better to regulate gambling in the small way that they can.
Similar to the fact that the post above you said, the government is trying to reduce the potential growth of those addicted gamblers, though they can't completely stop but the action may lessen the chance of gaining more gambling addictions in their jurisdictions,
given the fact that those who are already addicted may still find ways to continue playing but to save those who are not engaged yet that's still a gain for the goverment to fight against this type of vices.