I do agree with you on this point, you can't renounce gambling at a time, it's just like a drug. if you are addicted to it then you have to make a proper plan and routine. at first, you have to make up your mind, your strong determination can make it easy to give up. otherwise, it must be difficult for leaving it.
It is definitely easier to stop gambling rather than stop using drug. You are causing addiction on your own because you choose not to stop. If you choose to stop then you wont really have to bother yourself with it again and step out of it. We are responsible for our own action including action to stop it