When we can use gambling as entertainment, we don't need to worry if we will lose control because everything that we got, in the end, will be just to entertain and have fun. We don't think about the result because we don't search for that, and we only want to spend our time playing many gambling games. Maybe by thinking like that, we can prevent becoming addicting to gambling, and we can avoid consuming more money because if we think that it is enough to get entertainment, we will stop as soon as possible.
But if you think you think like that, it might be the start of it.
Most of the gamblers that are addicted to gambling might've just started thinking like that. They are just thinking that gambling is just entertainment and they are thinking they can control themselves. Then as time goes, it became a habit and as time continues they are not aware they are already addicted to it and can't actually get out of that "entertainment".