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If you meant to say that winning money with gambling shouldn't be our main goal, and that the main goal should be having fun, then I agree with you, but, think of it, it's not much of a fun to be losing all the time.
I wouldn't say all,
but the majority of the gambler population is losing most of the time in gambling. The reason why gambling business is still profitable and existing is because there are still people who win the game, and that's enough for the majority of the people who always losses to continue chasing and trying until they could make profits too. People get addicted to it because of their desire to win and their ego not to give up that easy.
I agree, but I think we should clarify what do we mean by "the majority ". If to draw conclusions from known house edges, this "majority" can be something in between 51% and 85%. I would say, around 70% on average. We still have 30% of winners, and that's a big number! Imagine 3 friends betting $100 each, and 2 of them losing their bets while one winning almost $200. They can see that winning is possible, so they will betting in the future. And that's how it works.