It depends on the player though,so it would be hard to do it themselves because it's not easy to avoid addiction.This self exclusion feature is already implemented in some casinos,but is it effective? If they really want to solve the gambling problem issue,they should ban casinos and other gambling platform in their country.
To ban gambling is not the way out when there are better solutions
That is true, even if self exclusion is applied on one gambling platform, the gambler can go to another gambling platform to play, this is possible and likely what will happen. What I even noticed, the gambling sites are not that helping, self exclusion can be temporary or permanent, it is even possible on some gambling sites disable it, very possible because everything to avoid money loss or addiction on gambling platforms can easily be disabled by the gambler himself, but this can also be handled by case to case.
Mandatory self exclusion and digital identity can help in a way the gambling sites will not take permanent self exclusion an easy case, it has to be permanent in a way the gambler can never revoke it anymore. Also digital identity in a way gambling platforms in a country and possibly in the world will work together to make use of a digital identity to link just a single gambler across all betting platforms, so if self exclusion is enabled, the gambler will not be able to gamble on other gambling platform any longer.