Imagine your son, who just turned 18, comes to you, saying, "Dad, I would like to learn how to bet on soccer." He asks if you can explain the basics, like understanding odds, analysis techniques, and the risks involved. What would you do

I know that, as a parent, you want to support your son’s interests but also worry about the potential downsides of gambling, which is normal from my point of view (well, I think teenagers may become addicted to gambling more easily than adults).
My question is: Do you take this opportunity to teach him about responsible betting, or do you try to steer him away from it? Also, if you are still supporting him financially, would you allow him to use the money you provide for betting? the money you work so hard for...
P.S.: Whether you’re a parent or not, you are welcome to share your opinion! 
This is serious OP, if you're a gambler and you know the effect or whatever happens when you're into it you won't want to let your child to start it in the first place but if he has the idea maybe from friends like outside the house then it can be tolerated some how. The only thing I'd do as a parent is tell him to never put too much interest in gambling because it can damage his life since he's still young and not yet financially stable. The idea on all these is to let the child know that without him having any money it can lead to stealing which is not good, to me if you want to gamble don't borrow or sell what's not yours even your property is not advisable to sell just to gamble.
I would definitely give him the idea from that point of view that he needs to have his own income to gamble and that he should not gamble if he is not in a good financial situation. I will also try to explain why he shouldn't and give him an idea about the fact that gambling is not a source of income. Because new gamblers make these mistakes. They initially consider gambling as a fun activity and later become addicted. I don't want to encourage anyone to gamble but I don't discourage anyone who wants to gamble for fun. Those who take gambling for granted will enjoy it but for those who want to use the money for income purposes, it will be a big problem.
Those who take gambling as a fun activity actually don't gamble to the extent of getting addicted, it's those who treat gambling like it's a win or die affair that end up becoming addicted to the game some how.
But overall, like you have said, we can't and shouldnt discourage people from gambling for several reasons, and one that reasons is obvious, and that is that we ourselves on this forum earn from promoting gambling casinos, if for example, we discourage people from gambling and everyone stops gambling, where will the casinos get the money for pay us for promoting them in forums like this?
Secondly, destinies are different, and there are people who are destinied to make it big from gambling, discouraging such one from gambling means that such one may likely never take hold of what he or she was destined for.
All I know we can do is to continue to advise people to gamble responsibly, don't treat gambling like it's a win or die affair, else, the gambling him or herself might be the one regretting at the end of the day.