I think every gambler still uses their instincts to determine bets, or at least continue the game or stop the game. We don't know how accurate each gambler's instincts are, but instincts can still lead gamblers to bet accurately, or vice versa. Nobody knows the luck of a gambler, they just bet according to instinct. they can win or lose. Some gamblers make bets randomly based on knowledge alone. but if he was lucky, victory would be his.
Actually, we can't explain why most of the time a person's instincts turn out to be right, it's like mind over matter, that what's on your mind, that's actually possible because it's manifested by what we think, we claim what will happen because that's what's on our mind, that's why there are other people who prefer to think only positive things prior a session of gambling and not negative things because sometimes what comes to your mind first, that's really what will happen.
I think however we will never be able to explain the reason why instincts are sometimes right or meaning sometimes our instincts can lead us to victory, but I think it's natural because gambling is about luck which is the name of luck can never be known when it comes and when it goes so this is a strong reason why your instincts are sometimes right and when your instincts are right then actually it's not that you are great and can predict but it's nothing more than just you are lucky.
There's this idea of "sometimes" in that your gut can lead you to win which means your gut can be wrong or you can miss and that's normal because gambling is about "probability" which means you might lose or you might win, so I don't think we can use gut as an excuse for winning because when your gut is right which leads you to win it's actually a situation where you're just lucky and nothing more than that, so it's as simple as that. And also if for example a positive mindset can lead you to victory or can make you able to predict what will happen then I think logically there will be many gamblers who do it for the sake of victory but the fact is that they continue to complain about losing.