Everyone loses in gambling both the addicts and those that are in control of their gambling lifestyle, losing too much doesn't make you an addict but chasing those losses constantly can gradually make you an addict. Moreso, constant wild gambling can be a symptom of addictive gambling lifestyle when it turn to be a regular pattern of going wild for you and not until you go wild you don't get satisfactory with your gambling for the day, mate that's addiction taking a center stage.
The ones that cannot control themselves while they gamble should probably stop doing it as the risk they lose way more money than what they can afford is too high, because for those that are impulsive they do not even need to become addicted or chase their losses, just a few minutes in which they lose control of their emotions can be enough for them to accumulate massive losses, and in that case they should just leave gambling behind as it is clear that only bigger losses are awaiting for them.