And what do you think, does refusal to play (deprivation) contribute to recovery from addiction or is it useless?
Depriving yourself to gamble will never help in the recovery of gambling addicition. The more you deprive yourself the more you will have the urge to play.
If you really want to stop and escape from addiction, it's better to do it small-steps at a time so your mind and body will be able to adjust properly. Stopping instantly might cause some withdrawal and likely bring you back into gambling again.