If we must wait till we learn from our lessons, then this has to come in a hard way, because to make lost does not come easy as women expect, that is why some we prefer that we learn from others mistakes than being the main victim, chasing after losses does not guarantees you recovering in full and that is if at all you can even manage to do little, because the more you are trying the harder it becomes.
Learning from others mistake is a hell of a advise, no
If you know what is right and wrong based on what you have learnt so far about gambling, then what is the need of you using a lesson again.
One thing I know is that if you can't learn from other individuals mistake then I don't think you will be able to learn from yours as well, except the experience hits you really hard.