They just after the money and together with those who facilitate this underground gambling, they are protected of those people in power, like you said instead of prohibiting better to maximize the use of this entertainment part, where gambler can access the platform and the government will be able to earn out from the taxes that the business will provide. Instead of illigalizing which they can't stop the lust and desire of those gamblers to keep playing.
Yes, and it is impossible for the government to make them listen to it. Players will always find their way to have fun, Governments are temporary and will not generate any kind of fun by prohibiting it If you start to see if they can have fun however they want, if they want to play they play they have everything for themselves, the people don't So these things are unfair because adults are being prohibited.