Most people see gambling as a hope for luck and we all can't know when we will get that luck and if we do, it's best not to continue gambling. And if we stay there, we will experience losses because we have lost a lot of money and it will become a burden of problems in our life.
What I've experienced with gambling is that it's indeed a game of luck but it would be a misconception to say that gambling relies on luck alone. Gamblers must be knowledgeable and tactical as well and find a way to engage in gambling in the best way that would not make them deliberately fail. I know some people who are gambling and are winning consistently, but because of greed, they would eventually lose all or some that they've lost due to over-gambling. In this case, your advice is very valid, and it's part of the tactical response I pointed to because if you are tactical, you will not only be engaging but also managerial, which demands to manage yourself and your money to know when to continue playing and stop, and not let emotion comes in.
It is true that indeed in gambling as in general that everything is very dependent on luck, you cannot behave selfishly by always expecting victory at the end of the session, because obviously all possibilities can occur there, not only victory but more often than not, defeat by a certain amount. Honestly for me personally I really agree if you say that gambling purely relies on luck alone, and also yes I would ask you what makes you say that gambling does not rely on luck, what does it mean that gamblers must have extensive knowledge as you mean? Is there learning related to how they have to play to be able to win? gambling is not a subject like in school that we can study to find the final answer, because obviously earlier you also said that you agree that gambling is a game about luck. That is a strong reason why many people, especially those who are addicted to losing a lot.
If there are people who can get consistent wins from gambling then it seems like you have to tell me what methods they use, the fact is that whether you are greedy or not, if at that time you lose, you will lose and if you are lucky, you will win. The last thing you said I agree that we should not overdo it.