I agree. Even he's already in legal age to gamble, the point is, he's still depending on his parents financially and the money given is meant for his studies and not for leisure.
Thus, it's normal for parents to be worried if they became aware that their son is into gambling. Therefore, an advice of looking for a side job is better rather than relying on his mother's given allowance. This way, the son can have a budget if he wants to entertain himself through gambling.
When I reached the age of majority, I could provide for myself, in which case you begin to look at money with a completely different responsibility. Of course, I tried different strategies in gambling at this time, because I was looking for a way to get rich quick, but I did it with extreme caution and worried even about losing small amounts on a loss. So it is possible that when a teenager starts earning money on his own, then his responsibility in gambling will be higher.
Yes, when you reach adulthood, you will have the opportunity to look for and get a job and like you said, you will be able to support yourself, albeit not fully, but at least you won't be so dependent on your mother. You say that you're looking for ways to get rich from gambling? I honestly don't believe in this at all, the principle is that gambling was invented just for fun friends and nothing more than that, so don't go too far looking for winnings there, especially if your goal is to get rich quick. Okay, I understand that you'll be using your own money here and won't be using your parents' dependent money, but still we should have a healthier view of gambling.
Lastly, I honestly don't think there's any strategy that can increase the odds of winning, that's just nonsense, and if that were true it would mean a lot of people getting rich but the fact is you probably also know that the rich get poor and the poor get poorer, that's gambling. So the bottom line is don't expect anything from gambling except fun, because it's purely about luck.
While gambling is mostly luck, I think games like Poker and Blackjack require talent and strategy. I've discovered that odds, game theory, and behavioral psychology can help, but not much. Even with ability and strategy, the odds are usually against one. I agree: bet just what you can afford to lose and see gambling as entertainment, not a source of money. I admire your care about gambling health.