It is just because of the greed for money. Everyone in this world needs money but the problem is that now young people choose the wrong way for making money. They should understand that gambling is not for making money, but it will take all your money in just a few minutes. The consequences of gambling are very bad and destructive.
Of course everyone needs money to feed their stomachs but that would mean a liberal society where everything is allowed and everything is decriminalized.
Does that sound as a proper healthy system to live in? Definitely not. Thats why people have to go to work earn a living and then spend their money as they want. Gambling if they wish is a part of their choices and these choices is what shapes their lives.
People do realize that in the young age they may have acted impulsively and taken wrong decisions but there is always time to redeem those mistakes and start anew.