Or maybe because people like to blame others for mistakes they or their relatives are responsible for. Instead of taking the responsability for the addiction, they prefer to say the gambling industry and the society are guilty for that. Furthermore, instead of trying to overcome this personal addiction in their lives, they pretend the solution to be anti-gambling propagandas to achieve a total ban of gambling activity in the world.
It makes me believe anti-gambling campaigns are vengeance tools used by people who don't know how to handle with gambling in a healthy way, so no one else can have some fun playing as well.
Good point, there are many people who thinks that way, instead of admitting that they are suffering from this addiction they are trying to point their fingers to other people. They are complaining instead of trying to help themselves in resolving the problem, we can't deny that fact that there are people who will push this propaganda in order completely removed this business.
They wanted to completely stop the facilitation it will bring them more comfort not to see someone enjoying, either greed inside or they don't want to see others treating gambling as good source of entertainment.
The gambling industry will never be removed, it already existed in so many centuries and it's already part of our culture. Maybe some countries consider gambling as a sin, so they'll remove it by making it illegal for citizens to gamble, but the majority of the world would still allow gambling.