In my opinion making cash from gambling is not a good option and the statistical probability that you will win every game at every casino is very low. I think winning or losing every game is completely in your head, so your individual tricks are not there. However, we all have some kind of luck so we should strive for what is possible for us.
I agree with you that making money from gambling is not a good idea. This is either not possible or very close to impossible. I'm not talking about victories and winning large sums of money. I'm talking about the original idea of earning money for a living by gambling. That is, when a person at some point begins to think that he is good enough to stop working and start receiving his main income from gambling. I think that this is not the best idea and most likely nothing good will come of it.
I don’t really understand what victory and defeat mean in your head. I think that some luck plays a big role in gambling or betting.
Luck is everything when it comes to gambling and that's why many people have failed when they think they can force or make a stand with the profits that they think can be gotten on a steady from gambling. I have a friend whose every little funds he has, he puts it into the casino with the intention of always wanting to double it and he is off the mentality that he can get whatever he needs to spend from that money back just because he is afraid of getting the money shortened and that for me is an example of pure greed and it has lead him to many failed attempt but yet he is still on the idea that gambling isn't luck based.