While gambling my instincts are mostly wrong. I am speaking from the aspect of a slot player. My instincts is just my emotions that wants me to win. In fact I don't trust my instincts. I follow the plan I have which is usually, deposit $50 - $70, pick my favourite slot game, do my spins, if I win, I withdraw my winnings. And If I lose, I try another day. I think that instincts come into play for games of skills rather than games of luck. Games where you have to really do your own homework, research, and put in your own efforts. That is where instincts may work.
I agree with you that instinct is not for a luck base game like dice and slot because you only to spin to get the outcome of your bet. However, it's only when I am on sportbet that I gamble based on my instinct so that I don't feel that bad after the game is over for not following my instinct if I lose.
It's not all the time that our instinct will work, because gambling is more of luck and not whatever your instinct tells you. This is why sometimes when you follow your instincts, you still lose your bet.