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That's because they see examples of their friends who play gambling and can win some money through gambling. Maybe if they change their mindset and don't risk losing money through gambling, they can still save the money for tomorrow. They also do not try to gamble and will stay away from it. Playing slots and other gambling games is okay as long as we can control ourselves so we don't get addicted.
As for me, it isn't the game that has a problem, it's the gamblers who can't control themselves from playing too much without noticing its negative effects on them physically and mentally. Slots will never be a problem as long as a gambler enjoys them positively and knows how to control themselves from greed and overplaying.