Those who have good control of course don't really expect to win, their main goal is to have fun or for entertainment. but it's better like that than gambling with the aim of making money, it will only make us unprepared for losing the money we bet and it can trigger us to do other things that are more risky. Every gambler must have good awareness about gambling so that they don't experience big losses, because those who experience big losses are usually because they don't have good enough awareness so they often take actions that get them into serious problems. Therefore, it is better for us to have a good mindset towards gambling, such as just for fun, nothing more than that.
Of course, I personally will continue to gamble if gambling can make money for sure, because of course I want something instant, especially in terms of making money, but of course gambling is not like that. If we really want to earn money we have to work to earn wages. Moreover, if gambling can make money for sure, I think there are many people whose lives are comfortable because they can make money by just sitting at home and constantly monitoring their gadget screens.
Yes you are right, it is better as you said to gamble just for fun and as entertainment with a note of self-control is maintained and if gamblers are able to do it they will not experience so much financial loss instead they will be happy with the gambling game they have run.
In addition, if there are gamblers who believe that gambling can make a lot of money and they fully expect the results of the gambling game, they will definitely soon experience regret and sadness, because in fact gambling is not a place to double money instantly but what happens is losing money easily instantly due to wrong perceptions.
Casinos make the "chance of winning" in every game as one of the strategies to attract many people to get involved in gambling, they are smart and know about what everyone needs like money, therefore many people lose control and think based on lust or desire that is not based on rational consideration, so in the end it is natural that there are some of them who try to make gambling a place to earn.
Although the idea sounds absurd if we think using common sense but yes that's what happens, and because of this why we never get tired of reminding especially to those beginners to always use common sense and rational point of view before entering gambling too far, because when they are too late then usually their interest in gambling is getting higher and that's what makes someone addicted which is a disease that is very difficult to overcome.