Which direction are you taking it? No gain, no greed in gambling? You are taking it far and not correct as you contradict yourself as well. Try to know the difference between grace and luck, we don't have grace in gambling, we have luck, and grace does not leave you easily, luck does, it can appear and disappear at any time. That is why we possess grace, but luck is temporary. Aside from that, you might be greedy as a gambler, and being greedy does not mean the gambler does not have initial plans and targets, it is when the gambler does not care about them by being emotional while gambling.
I am Agree with you mate, luck is temporary and not forever as a gambler we all know that in the world of gambling all games are based on your lucky days then you will win. But we must remember that if we don't have our luck in our side for sure we will loss and greediness shall be follow and if once a gambler will addicted to much then there's a time that they can not control their self and always thinking that I'll bet for this in order to get my losses back.
We have a luck as long as we are still alive. It can come out sometimes like in gambling and we can win something but luck doesn't last long so we must learn how to quit before it ends. When we step in then gambling arena we can do some warm up bets first only to tell if we have a luck that day or not but if there's none then we can choose to not play or just play only a small amount for fun.
Greediness can come not only when a gambler is losing but also when they are winning. This isn't a good trait to adopt so we should prevent this from happening because if not then it can lead to a more severe condition like being addicted.