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.