We gamble because we want a win, we can gamble excessively but for the purpose of winning excessive amount so it could change our lives financially.
Indeed, no one gambles because he wants to lose. But you know, a too big expectation to win in gambling, probably leads to depression or bigger loses at the end. That's why you need self-control and think realistically. No problem if you expect to earn some money from gambling but I suggest not to dream it too much. Moreover, if you rely on gambling to change your life.