What really makes a gambler lose? Is it greed? Well it is the illusion of control. Illusion of control leads to continued gambling and the more a gambler plays the more the casinos win, right? As a gambler, you should be able to identify these illusions so you can at least get a hold of yourself.
We often think, deep down, that we can control how we win. No matter how many proof we are presented with that the casino always wins we always think that we can overthrow this theory that applies to everyone. Then it gets justified when we actually win so we will continue playing thinking we can actually decide when to win.
I completely agree with you, basically a greedy gambler can be said to be experiencing an illusion, where they usually think they will always win if they play continuously, when in fact we know that no one can win continuously in every time they open a gambling or betting session. I think people, especially for gamblers, need to be aware of this illusion of control, so they can control themselves (especially for gamblers who have indications of addiction). Furthermore, the mindset also needs to be instilled that we can actually decide when to win, meaning that when someone makes a profit while gambling, then he can take a break to stop gambling or betting at that time, and can do it again at the right time (without disrupting other productive activities), so that means we can actually decide when we will win as you said.