Both online and offline method of gambling has their advantages and disadvantages. When it is about curing someone who is addicted you can see it as this;
Offline solutions
Under this, the relatives of the addicted gambler can meet the offline casino and caution them not to allow the victim gamble again;
They can even travel the victim out of the environment that the casino is located.
Online solution
This is difficult because there are ways to maneuver and still gamble. Even if you black list the IP of the victim, the may get a VPN to change their location and continue to gamble. It is risker online than offline to control.
If a player wants to play, he will always find any way and no one will stop him, many have been convinced of this in other topics. I think it all depends on the player and how the environment affects him. Some may be influenced by the more relaxed offline state, with the pleasant music and free alcoholic drinks served by nice and young girls during the game. This can make the player completely relax and even if he wins, he will return to this pleasant establishment where he is always welcome, leaving his previously won money there.
The online casino will lure the player in its own ways which can affect his psychological state. Bright pictures, music and nothing more. Therefore, most likely, players lose less in online gambling.