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.
Having an idea to making money from gambling is a bad idea because we knows that gambling is not a place to do that. Playing gambling needs to have luck while not many people have but they will still playing gambling because they thinks that they will wins in the next rounds. We don't knows how many rounds they will spend to wins but one thing that we knows that if they playing gambling too long, they can lose their money but they will still difficult to win. We must knows and realizes that playing gambling is just for have fun and needs to be moderately so we don't lose too much money, especially we knows that winning in gambling needs luck. When we can understand this, we will not spends much money to playing gambling and will not chase the wins instead just to spends the money we can afford to lose.