Finding hobbies, work and other activities to occupy yourself is essential in dealing with gambling addiction, in my opinion it's completely wrong to say that it's not working. People who have enough willpower to break addiction with a single resolution are such a minority and probably don't get addicted in the first place. But average people who struggle with addiction need all the help they can get, so any advice that can make it easier to deal with addiction is extremely valuable for them, but you just denied it and tell people to "deal with it".
Gambling addiction can happen to everyone, your gambling goes from fun and develop to unhealthy preoccupations with serious consequence, whether it is sport betting dice or poker or any other type of gambling.
If you have some serious gambling, remind yourself of how It can destroy your relationships interfere with your work, and lead to financials disaster, and could you even lead you to stealing money to gamble, think of all of those and think is it all worth it?.