To be honest, I don't know if it's possible to reduce an addiction. A friend of mine, a former gambling addict, once told me that addiction is such a thing that you either have it, or you don't. You can't reduce it. He was cured by a professional, and he has no addiction know, and I'm happy for him, but it's from him that I know that only a good professional can help you to end your addiction.
You cannot reduce an addiction but you can control the addiction behavior. That would take a lot of willpower and control of the mind to be able to achieve the desired result. I have seen many fellow gamblers who were able to control their addiction, it did not come in a day as it takes some time. It would require an addicted guy to consult with a professional or a group to help an addict control his behavior.
Even professional players need help. A short story that I saw just yesterday.
There is only one poker blogger that I rarely watch. He has 3 children and leads a healthy lifestyle, which attracts me. So he decided to arrange a marathon to earn a certain amount in 20 days. Yesterday he started the last days of the marathon and was closer than ever to the goal to win it, but after spending 11 hours on the stream, he lost everything he had won before in this marathon and went into the red. Even though he has 15 years of professional poker experience. Now he wrote that he needed the help of a psychologist because he could not cope with this. This shows how difficult it is even for professionals with great experience.