Exactly, and maybe I will say one of the reasons why it is always difficult for them to maintain the various plans that they have made before that lead to limitations, the reason is only one, namely they cannot maintain awareness and also most likely they do not realize that gambling is full of temptations, as you said that one win can divert all attention, and even if you are not the one who managed to get it and you only hear about other people's wins, it can actually affect your approach to gambling, all of that happens because of the obsession and enthusiasm for winning.
So I think that no matter when and even if for example you already understand the concept of gambling I am sure that there will always be a time for you to get trapped or fall because you see temptation, but if for example from the beginning you already know about the possibility then it should not happen to you too often, because you already recognize the signs.
Gambling and betting constantly remind us of themselves from all sources. This includes advertising on the Internet and on TV (in the country where I live, gambling is prohibited, but betting is allowed), so in Prime Time, there are often cheerful calls to play gambling games. Also, on my smartphone, I constantly see gambling and betting ads, especially on sites that are not shy about any advertising and are ready to advertise even very bad betting organizations.
And because of all this, it is very difficult for a problem gambler to overcome his addiction. And it often happens that his friends often talk about their winnings.
I admit that the story you told did happen, and indirectly this should be a warning for us to always maintain our level of awareness that gambling is high risk and can also have a serious impact on your life (even though you know how to gamble properly), on the other hand environmental factors and the development of this increasingly sophisticated era are also one of the things that make it very easy for people to be exposed to gambling and the possibility is getting bigger considering that now most people, especially teenagers, are much more comfortable using most of their free time to play the internet.
What I am worried about is the safety of children who are still minors, meaning parents should know and be aware of the dangers that are lurking, as much as possible we must exclude ourselves including children who are still minors to avoid exposure to gambling in any way we can.