It is mostly because agencies which are supposed to help people with problems like alcoholism, drug abuse, suicide ideation and gambling addiction are commonly unfunded, since most of them are non-profit organizations. That kind of entities mostly rely on donations and rarely get active funding from the government. So for example, of there are 100 people who are addicted to gambling and need counseling, the organization (in order to manage their limited services in a wise way) only hire 4 operators to take care of the questions and problems of those 100 gamblers who are seeking help.
The result is obvious, many (if not all) of those gambler will feel neglected by the system they attend to for help.
That is why I personally believe the most important thing to have when facing these problems is a good relationship with family and friends, to supplement the counseling one could get, public or private.
I think government has left much of the role of rehabitating addicts to NGOS. Government is said to be corrupt and can not freely handle organizations like that because money meant for such agencies end up in private accounts while affected persons languish in their own helplessness. Lately, it is the NGOs that have taken up such duties to cater for people who need such help. One thing about NGOs that is better than government in such case is that they have close contacts with the those affected unlike the government that seem far and ineffective because of corruption.
However funding is still the challenge of NGOs except those own by philanthropist and wealthy people then they can comfortably finance and take care of persons of such challenge.
One also needs to point out that the relationship governments have with NGOs can vary, depending on the political standing and the personal interest of those who are in power within the country. Perhaps, there must be some cases where people working as member of the congress get directly benefited from casinos and gambling activity in the country, so they do not care to fund organizations or hospitals which would help people in need because their addiction. Even if a NGO is well funded and willing to help in a specific country, some leaders do not think of their presence kindly, since it can imply the administration in such country is a failure when comes to social problems. That was the case in my country: the central government campaigned on being highly sensitive towards social problems and promised to take care of those how needed assistance, when they failed to make their promises a reality, those with addictions to substances and gambling had to seek for help in NGOs headquarters, there is when the friction between them and the government started. Specially because those NGOs openly speak of the atrocities the government allow to happen by not providing money to their own hospitals and psychiatric facilities.
There are too many NGO that are simple money grabbing groups that serve just to place the goverment list of people "owed a favour". However there are many legit ONGs in which they help people with strong social issues and integration problems, so I am sure there are many legit opportunities for those who are seeking to control their response to gambling and getting it under control.
But how much could the casino or these gambling organizations and platforms go in rendering this help to the people in need, also how effective could this be to the life of every gambler for their own benefits, we cannot compare the way the gamblers will first help themselves to how the other external rescues could be effective in making them have a better experience and change like never.