You can actually win in gambling, the problem is people don't know how to control their greed and when to stop gambling.
What you are saying is a temporary win, to be consistent in gambling is what you called a success and everyone wants that.
Typical gamblers only won sometimes but loss most of the time and that does not show consistency, with this, gambling sites are getting more profitable.
It's how we think actually, if we are satisfied that way, then we will surely enjoy gambling but we won't be profitable.