In reality, those gamblers that have a serious gambling problem already might not refer to any form of help as they are already owned by the negative effects of gambling. Those gamblers are in need of a serious approach and their families and friends play a big role to help them.
Maybe the site mentioned by the OP will help instead those people that still can control themselves despite feeling emotional stress due to gambling.
But for those who are new to the gambling world, as much as possible don't allow yourself to experience such negative effects that gambling brings to us.
I absolutely agree with you. Until the gambler himself understands that gambling affects him negatively and begins to fight his desires, which he cannot control, nothing will change.
So if your friend has a problem with gambling, try to help him or her understand the problem and point out ways to solve it.