It's more about how it dominates every ad break now and how it influences young kids. If they constantly have betting odds and ads shoved in their face, then they're much more likely to develop unhealthy gambling habits from a young age as they're desensitised to it.. Like Marley said, it's even in video games now.
Obviously people should be held responsible for their own actions, but the betting agencies should also be held accountable and should be regulated the same way tobacco companies were. I'd argue that despite the obvious health risks of smoking, the impact on families and the destruction gambling can cause can be far worse at times.
All people are saying is to limit how much they can advertise and at what times. And get betting discussions out of sporting broadcasts. That's not too much to ask.