When viewed from a religious point of view, gambling is indeed prohibited let alone the money generated from gambling. But it seems that everyone has the right to determine what is best for himself and is free to choose his life path.
In many countries, gambling is also prohibited and if this rule is violated it will be subject to appropriate sanctions. But that also does not reduce people's interest in gambling, because of this difference in perception that causes them to be free to act. If you ask those who gamble, why gamble, isn't gambling prohibited ? So I'm sure you will get different answers and goals.