Indeed, a hobby is something that is done based on one's own desires because it can make us happy to do it, as you said, swimming, fishing, playing games have benefits. But of course everything we do has its own risks, now if we like playing games and don't have a job it can make things difficult for us. because playing games too often, in my opinion, is not good, there will be a feeling of being lazy to move other than playing games. It's the same as gambling, which has a bad impact if you make it a hobby, unless you can control yourself as well as possible, it's not a problem, it's just that many people gamble excessively, which is not recommended.
I myself like gambling, but I don't make gambling a hobby, because I have bad thoughts about gambling if it becomes a hobby. As you said, making gambling a hobby can be dangerous, so if you really like gambling, it's better to gamble sensibly. In my opinion, it's not advisable to make gambling a hobby.
Gaming, gambling - these things need limits. Period. Im not judging those who enjoy them, but I've seen the damage firsthand. People zone out, lose focus. Addictions happen, believe me. Its science, not opinion. Before you know it, you're not just losing money, you're losing yourself. Im all for winning, for being the best. But there's no victory in letting a hobby take over your life. Balance is key, its what separates the winners from the losers. Gambling is for occasional fun, not a way to make a living. Anyone with brains knows this. Be smart, be strong. Success comes from discipline, from drive. Dont let yourself get played by the game. You're better than that.
Actually, it is the right of each individual, because it is their desire so it is their right and we do not judge nor do we question it, it's just that of course we don't want to see the closest people or even our own friends. Therefore, it is not wrong for us to advise him to prevent bad things from happening. It is possible that they enjoy what they do even though it harms them but it is true that you say something that is interesting to us will of course make us addicted like online games or even gambling.
Basically, gambling should be done for entertainment only. If they aim to make money it can actually make them addicted to gambling. And of course that is not a good thing, instead of wanting to be a winner but it does make them a loser, if you really want entertainment I think there are still many other things that can be done that not only make them entertained but may even have benefits.