Frankly, the truth is that, everyone wants a remote job and always want to be a boss of our own and if we can be sincere with ourselves then you’ll realize that, gambling is one way we can earn a good life legally even as a teenager in a country like that of mine(not trying to paint the country bad but meh, gambling is already proving to be the hope of a common man in a country where government is already neglecting its citizens and automatically drag us to extreme backwardness.
I still maintain my point that, the casino has a very huge role to play in the regulation of underaged gambling and that’s if they will be very sincere with their KYC terms and policies.
If the country people think that they can earn a living with gambling then I am afraid they are moving in the wrong direction or are too lazy to do any hard work to earn a living. Mind it that it is an era of Online earning but I don't think that gambling comes under this criterion of online earning. Gambling is too risky to be termed it as an online earning method or something from which one can earn a constant income.
And regarding your 2nd point of casinos should be sincere with their KYC requirements and should not let under age gambling, but it is seen that casino's motive is to earn money and as long as any minor deposits and play, they will close their eyes even if the minor submits fake documents for KYC.