I think its not hard to be a responsible player, but its hard to build «past» to be prepared to be responsible. From my vision, a person who has enough money, knows lots of ways how to earn them (not only in theory), have stable income, can gamble responsibly and greed will never lure him to dark side. Its not easy to become such a person, but if someone managed to become like it, he wont have problems with gambling.
People should choose to be responsible in their lifestyles and finance, that is when they can be responsible gamblers. It is not quite feasible to learn being responsible because of gambling, it has to be a lifestyle that affects every areas of life especially in finance. The important aspect about responsible gambling is not to gamble to become rich because that can lead to chasing loses which will eventually lead to addiction. Even when you're lucky and gets rich through gambling if you're not disciplined and responsible you'll lose everything back to the casino.