This is where many gamblers actually go wrong. They know they should control their emotions properly but they don't do it in their actual gambling. That is because they can't remove the greed and addiction from their character in reality.
But if they start doing this little by little even by limiting our gambling money, we won't notice that we will gradually be able to control ourselves.
There is a need to be consistent in controlling how much we gamble. Because without consistency, a gambler will get back to what they used to be.
But I agree that with gradual changes, an addicted gambler wont notice that and I think that is the best feeling when one was able to overcome it and gained control to his or her addiction.