Believe me, all the redundant advice that you gave are already being discussed and commented many times on bunch of gambling discussion related gambling advice.
All the point that you mention is correct but the only problem is execution in actual gambling game since it’s very hard to control your emotions when you are in the presence of gambling. You can’t stop yourself to do careless move when you are gambling so it’s better to have a limitation set before you gamble at all.
Right, we agree with that.
We often discuss it on several occasions in various threads. however, the real problem is not a matter of taking it lightly and forgetting the concepts and ideas that we often discuss as stated by OP. in fact what OP said or suggested is a good idea so that we do not gamble excessively, especially the idea that we can enjoy every game session. but the real problem lies with us gamblers ourselves, where emotions often play a role that makes us careless and difficult to control ourselves when playing. whatever type of game, if we are careless, we have the potential to experience a defeat that costs a lot of money even though it should have been avoided if we were aware of our limits. but this is the type of entertainment that involves the risk of losing money in it, after all, if luck is on our side, the money we get from winning can be worth the risk. if not, maybe not many people like gambling. although, many say it is difficult to beat the house. but this is gambling, if more gamblers win, it means that many houses will not last long in this business.