This is a commun practice in every treatment for behavioral addicts. This kind of addiction pathology can't be treated with medicines only but it requires a full process behavioral treatment which all the environment should part of. The most important is that the patient himself should be aware of all of this.
What you say is very important, the person who is in that stage of addiction must have the support of everyone, of course first they have to think that if they are going to get better, they must have every intention of doing their part so that they can be cured, it is not easy because emotional states always tend to attack the person from within, but seeing so much support, from family, friends, doctors it is possible that everything will turn out well and the objective will be achieved.
It is relieving for an addicted gambler to know he has the total support of his people in helping him regain control of his person. When we scold and abuse a gamble addicted relative that is suffering from the cold hands if gambling addiction we are in no way doing them any good than driving them more deeper into the worst form of addiction which can be dangero to not his person alone but to those around him. Gamble addicts are stronger to recover their energy back when they have people that expresses care and concern to their wellbeing without been judgemental.