I believe that almost any entertainment can lead to one problem or another if abused and it is up to our actions whether or not we get into trouble. For example, reading can have a negative impact on eyesight if read in the dark, eating delicious food can lead to obesity, professional sports can lead to injuries, promiscuous sex can lead to sexually transmitted diseases, etc. The list could go on for a long time. So don't abuse gambling and keep your finances under control and then you shouldn't have any problems.
We might see gambling as entertaining but we should also look the other way round why we always choose to come and bet. We all wants to be seeing our bankrolls increases which I think is the ultimate reason why we keep trying luck even when we won or lose the previous bets. There is not harm in trying which has been a wise saying that has been keeping many of us that are either gamblers nor non gamblers to keep working hard to earn something out of our trying. We want to make money, the casino wants to make money too. Winning or losing must falls between the two parties and that is mostly determined by luck or the amount of skills that we have.