I definitely agree with your statement.
That is the problem when you are dealing with something that is highly risky- there can be no absolute result as you may either win or lose without any given notice. Gambling can be beneficial when you win; but it can also be potentially destructive at the same time if you fail to control your habits as this will result to spending tons of cash in the process.
While today may be your worst day in gambling, look at the brighter picture and learn from this experience. Should you try to recover your losses by gambling again? I do not think so- but at least you gained something invaluable which is the experience and learnings from this unfortunate event.