I think majority of people who are addicted to gambling is because they do not understand gambling as beginners, the rules and the side effects of playing gambling excessively.
Don't expect beginners to act as long-time gamblers already that's why they are called beginners right? But fortunately, not all beginners are ended up addicted since they know how to use their common sense. I don't think we can really help them not to get addicted because they need to feel the actual pressure of gambling before they can think if getting involved in gambling for long will be good for them. If we just tell them the basic advice prior to their actual gambling, they won't understand at all since they don't experience yet being a big winner or big loser.
Just trust these beginners not to get addicted on the way. I still believe that there are lots of newbies who know how to use their common sense and will realize right away if there's something wrong already that is happening on their gambling journey.