It is indeed challenging to be a responsible gambler; only a small fraction of those who engage in gambling can do so responsibly.
Being responsible is not a decision we can make because we want to and then be Irresponsible in other aspects of life, if we are responsible we will be responsible in everything, we may get Carried away by emotions in a casino , but the Responsible person will not lose a lot of money because they know they must maintain themselves and cannot give in, those who do run the risk of getting into trouble and obviously falling into addiction.
It's a tough thing to be a responsible person, but you have a point about what you said. It's about being responsible anywhere, and if a person or a gambler is used to what he is doing, then I think it will be normal for him to have control over his gambling habits.
Still, that's a tough action to do, to be responsible. In gambling, it's always the emotions that we need to keep under control, and when one is losing, the emotions go up, and that's when we make wrong decisions.