Of course, an exception can be made only for the simplest push-button mobile phone exclusively for phone calls. But it is clear that this extreme method also provides for the isolation of the player himself in some clinic where there is no access to the Internet or in some remote area also free from gadgets. But if we are talking about serious gambling addiction on the verge of insanity, then apparently this is the only way to stop the process of destruction of the brain of such a player.
And any self-control and self-restraint with free access to gambling from different IP, and with VPN, this is all certainly not an option for real restriction of access to the game.
Who is going to do it and control such a gambler? Imho, too addicted gambler can only help himself when he realizes the essence of the problem. Neither gambling sites that offer to enable self-exclusion options, nor relatives, nor doctors can help such a person. On the contrary, if there is external pressure or any restrictions on such an addicted person, he is very likely to look for new ways around it.
And reproaches and abuse from relatives just make the recovery process of the gambling addict even more difficult simply because they constantly remind the player of gambling and the pleasure and adrenaline that he gets.
However, sometimes the media reports on the treatment of gambling addiction (which, by the way, is actually recognized as a mental illness by the World Health Organization and generally by all countries), namely by completely isolating the patient in special hospitals. Of course, we are talking about the most severe stage of this disease, when the patient completely loses his mind because of gambling addiction. In such cases, you still can't do without isolation from any gadgets.
By the way, such treatment costs a lot of money and patients are usually not poor people.