Unfortunately, each gambler will have this addictive mindset when they start to gamble more often and win. Their minds will focus on achieving victory, which is not easy. Maybe we can say that successful gamblers are addicts, but we also have to remember that successful gamblers can have healthier thoughts than most gamblers. Successful gamblers, even though they are addicted, can still control their addiction well and will even use their abilities to avoid excessive gambling addiction. The system in the casino is just a system that will give us a win or loss so everything will depend on us as gamblers. If we want to avoid losing a lot, we have to know when we should stop and not, based on how many wins we have to achieve, before we stop gambling.
Investing much time and money into gambling doesn't make us addicts. Successful gamblers have a life outside gambling; family, friend etc. They have fun times when they're not gambling. An addicted player, gives all to gambling and forfeits any other recreation that is not gambling. Their life revolves on gambling and they stake anything just to gamble. Such behaviour doesn't guarantee winning, a proof of success in gambling. If a person gives their all into gambling and doesn't win they're not successful, while being addicted to gamble. Hence if a person dedicates specific time on gambling and wins often, due to their extensive techniques of how gambing works. I'd add the person as a successful gambler. On the both sides, if a person is addicted and wins big too, they're successful gamblers. Because their addiction in gambling didn't end in playing games, but in devising methods that works for them. So, categorizing them, we can say that not all successful gamblers are addicts, same way not all addicts are successful gamblers. Even, a good percentage of successful gamblers play for fun.