I think that the earliest age to start gamble is 21. Youngsters are hot-blooded in general to make the considerable judgment in the course of their gambling particularly when the question is the money they lost. They don't have more than often their own sources to get money thus they either are disingenuous with their parents or what are even worse commit an offence to get money.
The gambling streams are presented in a way that it is appealing and attracts many people towards gambling. Those videos and streams are publicly available for everyone including the minors. When they see such attractive and easy money making, they will insist on making money from gambling and not focus on the real earnings for making a living.
Setting up wrong expectations will only lead to put hard earned money into gambling only to end up losing it all. This is not only that young blood are attracted to it, but everyone is influenced by flashy advertisements promising easy money. A teenager would be more encouraged to spend their pocket money on bets and streaks of initial wins will make them make wrong decisions because they don't realize that gambling is unpredictable and risk management is something they never learn.
All that you said is nothing but the absolute truth, I agree completely with you..
But however, the good thing still is that, any body who makes such mistakes as falling for such advertisement on gambling, which made them believe that it's so easy to make money off gambling, they can always correct themselves from their own experience, except for those who have already made of their mind to go wayward on gambling.
I corrected myself and any one too can correct him or her self, I came into gambling believing that games were so easy to win, that in less than a month of me gambling, I did be counting in millions, I envisioned the type of mansions I will build with the money I win from gambling, and also thought day and night, of the expensive cars I will be driving, the lavish and luxury life I will be living, all this is because, I saw a very close friend of mine win around $122 from a $2.5 bet, I got into gambling with the wrong mindset and after gambling for over a week and losing money with no single winning, I started to ask myself some questions if winning in gambling was really as easy as I thought it was, and this was how I started losing enthusiasm, interest in playing because gambling wasn't actually what I thought It was, which is - easy way to financial abundance.