no matter how irresistible going for more or controlling the urge of excessive gambling is, there are people that still conquer and I think that's what every gambler is suppose to figure out ways to stay safe from getting addicted, if some gamblers are following rules, I don't think we will ever discuss anything that concerns addiction, is just that greed and loss recovery mindset won't let some people think right while gambling.
What determines a gambler is how tolerance they could be while gambling and I mean this depends on their risk index, there are people who can accept much risk while gambling and whenever these sets of people loses little money it gets to their nerves without them having to accept the risk associated in gambling before they start gambling. Perhaps we do have responsible gamblers who doesn't allow anything to influence them but are strict to maintaining rules that could governed them to successful gambling, and even though we know that gambling is a game of probability at least they less expected winning while gambling and when it comes it is just like an added advantage to them.