It won't help if you really have an addiction. If you ever got drunk, woke up the next day and told yourself you won't drink again you'll know what I'm talking about.
A real gambling addict if you block his PC will go to a friend or to an internet cafe to play.
You gotta teach yourself, not manually put in blocks. If you want to gamble you WILL gamble.
What helped me was put all my funds in a xapo vault, takes at least 24 hours to get out, and this puts me off wanting to gamble because ill have to wait days. If I have funds in my blockchain wallet however, its super easy to get the urge