I think that having a positive mindset is keeping us composed when we gamble. Even on the bad days, it keep us on shape and won't make our approach towards gambling to become more aggressive. I agree that positive mindset is not enough for us to win our bets but some certain strategies depending on the games that we're playing. But one thing that we have to appreciate having a good or positive mindset is making us calm at most times.
Aside from gambling, we should all carry along with us a positive mindset. It helps us see the world differently and react to things in a way that they do not get to us. And in gambling, it amplifies everything. One of the ways that a positive mindset works in gambling is that it could keep you from overshooting your bankroll. No winning is promised but with a positive mindset, you will comfort you after the loss.
Positive mindset will lead you nowhere but a series of debts. Your positive attitude will not make your chances of winning any higher.
I do not completely. I think that it is only blind optimism that can lead to debts. Blind optimism without common sense.