i saw a post here once asking about whether banning gambling will actually solve some problems. well even with gambling deemed illegal, it has not completely disappeared from a country. for example, in north korea gambling is illegal for its citizens.
but there are still gambling events that take place most often organized by some authorities or really rich and powerful people. i guess that making gambling illegal is just a way to make it less accessible to the general public but the rich always finds a way.
there was even a case where north koreans are targeting foreigners and selling them their own made gambling platforms.
North Korean IT workers created and sold thousands of illegal gambling websites to South Korean criminals to raise billions of dollars keep in mind that gambling is also illegal in south korea. so my point is, everyone eventually finds a way.
Of course some people find a way. Thing is that laws don't exist to remove crimes, but reduce them. They can only aim at removing them, but in reality there will always be some people who are criminals no matter what the laws are. Some people just rather risk the punishment, but unlike in cases where something is legal, it's going to be a smaller group.
But just because there are criminals, it doesn't mean that laws aren't reducing the thing they are designed to reduce.
As a personal note, imho there are other, more effective ways to combat problem gambling then banning it.