I also do it sometimes but I totally can help it to be honest, I think its a sickness for sure, because I really have some weird feeling if I gamble.
You get addicted to it and you can't control it. If you are an addict already, you have the urge to always gamble no matter what the consequence is. You get bankrupt, you're neck deep in debts or you neglect prople around you, it does not matter as long as you can gamble. That is ehy it is a sickness.
Worst thing is, if you can't get money to sustain your gambling addiction, you might turn to crime to get money. But that is only worst case scenario. I don't think there are that kind here. We are just mostly light gamblers and still controllable. But still, gambling could lead to sickness if left uncheck.